The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board > Projects and Builds

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-14-2021, 07:23 AM   #451
6DoF
Registered User
 
Join Date: Nov 2014
Location: somewhere, PA
Posts: 452
Re: Yet another GMC build

Quote:
Originally Posted by OKGMC4 View Post
I found my core support holes don’t line up by 3/4 to 1 inch
in width or distance from the body mount?

if distance from the body mount, you can probably find that much just by loosening everything and biasing the cab to the chassis, the fenders to the core support, core to frame, etc.

if width, can you just add a plate to the core support?
6DoF is offline   Reply With Quote
Old 07-14-2021, 09:19 AM   #452
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Quote:
Originally Posted by 6DoF View Post
in width or distance from the body mount?

if distance from the body mount, you can probably find that much just by loosening everything and biasing the cab to the chassis, the fenders to the core support, core to frame, etc.

if width, can you just add a plate to the core support?
The core support is behind the bracket holes. They line up perfect side to side but they are far enough back that the splash pan actually hits the bracket before fully in place. I thought about loosening the front but everything lines up so nice as it is. The core support holes are large and may allow me to tilt it but the splash pan is still a problem. Thinking to remove the brackets and lift the frame up and see where I’m at. May be able to relocate them or build my own.
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-14-2021, 09:23 AM   #453
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Could also try to tilt the core and trim the back of the splash pan to fit. Will investigate more
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-14-2021, 11:07 AM   #454
Russell Ashley
Senior Member
 
Russell Ashley's Avatar
 
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,569
Re: Yet another GMC build

What's that front crossmember in the old frame out of? That thing looks huge.
Russell Ashley is offline   Reply With Quote
Old 07-14-2021, 11:16 AM   #455
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Quote:
Originally Posted by Russell Ashley View Post
What's that front crossmember in the old frame out of? That thing looks huge.
That is a corvette factory crossmember. It’s made out of stamped sheet metal and can flex under load. C4 suspension in a 55-59 usually puts the engine much farther forward and higher than the stock corvette. I had trouble keeping the alignment correct because all the weight was shifting things around. Shouldn’t be a problem with the new Flatout engineering crossmember.
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-15-2021, 09:48 PM   #456
dsraven
Registered User
 
Join Date: Nov 2010
Location: calgary alberta
Posts: 4,866
Re: Yet another GMC build

look in here for frame dimension drawings. the 58-59 frames are longer out front and the rad support brackets are in a different location. it's all ahead of the spring mounts so from there back they are the same.

https://www.trifive.com/d1/55-59Assy.pdf
dsraven is offline   Reply With Quote
Old 07-15-2021, 10:02 PM   #457
dsraven
Registered User
 
Join Date: Nov 2010
Location: calgary alberta
Posts: 4,866
Re: Yet another GMC build

frame dimension drawings start in section 2 sheet 24. you are looking for sheet 33. a lot of the dimensions are given off the imaginary face of the cab line (firewall) so you may have to look closely to find the place where the rad support brackets are measured from. kinda looks like the center line of a cross member at the rear of the cab and takes a couple of dimensions to add up for the total dimension.
anyway, you'll figure it out.
dsraven is offline   Reply With Quote
Old 07-16-2021, 08:34 AM   #458
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

I ended up knocking out the rivets and moving the brackets back about 1”. Since it was kind of hard to access to drill new holes I just welded the brackets to the frame. Cab is bolted solid to the frame now. Got in the gas tank, battery drop box, and cleaned and painted the Dana 44 so should be able to start reinstalling suspension.
Attached Images
 
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078

Last edited by OKGMC4; 07-16-2021 at 01:39 PM.
OKGMC4 is offline   Reply With Quote
Old 07-16-2021, 04:14 PM   #459
joedoh
Senior Member
 
joedoh's Avatar
 
Join Date: May 2007
Location: Doodah Kansas
Posts: 6,560
Re: Yet another GMC build

good solution!
__________________
the mass of men live lives of quiet desperation


if there is a problem, I can have it.
joedoh is offline   Reply With Quote
Old 07-22-2021, 06:41 PM   #460
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

So far so good. Still figuring out the firewall. Will either be homemade or a wheelbarrow. Deepest “big block” firewall is 4” recessed and I need 6”. Will have to move the gas pedal over, and the brake pedal. Vintage air unit may not fit right anymore. Plenty of obstacles that I’m sure have grand solutions. Just need to stare at it long enough and drink more coffee.
Attached Images
  
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-22-2021, 10:26 PM   #461
solidaxel
Registered User
 
solidaxel's Avatar
 
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,742
Re: Yet another GMC build

That looks like a lot of engine set back
__________________
53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD)
53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25
55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73
62 Solidaxle Corvette Roman Red (327
340hp 4spd 3:36) C4 & C5 suspension tube chassis
LS 3 4L70E
65 Corvette Coupe 327 350hp 4spd 4:11
78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42
2000 S-Type 3.0 (wife cruiser)
2003 GMC SCSB 5.3 4L60E 3:42
solidaxel is offline   Reply With Quote
Old 07-23-2021, 01:01 AM   #462
daveshilling
Senior Member
 
daveshilling's Avatar
 
Join Date: Jan 2013
Location: roseville
Posts: 455
Re: Yet another GMC build

Quote:
Originally Posted by OKGMC4 View Post
So far so good. Still figuring out the firewall. Will either be homemade or a wheelbarrow. Deepest “big block” firewall is 4” recessed and I need 6”. Will have to move the gas pedal over, and the brake pedal. Vintage air unit may not fit right anymore. Plenty of obstacles that I’m sure have grand solutions. Just need to stare at it long enough and drink more coffee.
I'm doing an LS on a c4 Front, and that's a healthy setback!! I actually ended up cutting up my mounts to try again since I wasn't doing the firewall. Are you trying to make clearance for turbo piping and an intercooler?
__________________
My Current Trucks:

1958 Apache Extra Long(Now Short) Step Big Window "Lucky" C4 IFS/IRS LS 5.3 build thread-Found a cheap truck to learn on
1956 GMC Suburban Pickup: Poncho 389, Hydramatic, Factory P/S, RSD, Clock
1959 Apache 3100 Shortbed Camper Special with Spare, 235/4 speed, Factory Positraction rear.
daveshilling is offline   Reply With Quote
Old 07-23-2021, 06:09 AM   #463
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Quote:
Originally Posted by daveshilling View Post
I'm doing an LS on a c4 Front, and that's a healthy setback!! I actually ended up cutting up my mounts to try again since I wasn't doing the firewall. Are you trying to make clearance for turbo piping and an intercooler?
Yep. That's about where an LT1 was placed in the original C4 and it should restore the balance for better handling. I should be able to put the intercooler where the radiator was, and make a new mount for the radiator just after that. If you don't want to cut the firewall you have to get the engine over the rack with the rack between the balancer and oil pan.
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-27-2021, 07:29 AM   #464
6DoF
Registered User
 
Join Date: Nov 2014
Location: somewhere, PA
Posts: 452
Re: Yet another GMC build

holy mid-engine batman!

the Cummins needed a 6" doghouse too, but wasn't that wide. while a wheelbarrow would be sweet, i'd be more worried about keeping the doghouse as narrow as possible.
6DoF is offline   Reply With Quote
Old 07-27-2021, 11:59 AM   #465
dsraven
Registered User
 
Join Date: Nov 2010
Location: calgary alberta
Posts: 4,866
Re: Yet another GMC build

I recommend to sit in the cab area and place your feet where the pedals would be. Nothing worse than a cramped accel pedal on a long ride and you need room for your foot to access the brake pedal easily. Try to make the firewall recess as narrow as possible. Maybe even a removable cover like a van has. Also think of shape if you plan on upholstering it. If a wheelbarrow is the shape you like but too wide, you could split it and seam down the middle. If going with sheet metal from scratch, mock it up with posterboard or even wood veneer and tape.
dsraven is offline   Reply With Quote
Old 07-27-2021, 08:21 PM   #466
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Im seeing what you guys are saying. The width is more of an issue on this narrow cab than it would be on a c10. To get this to work I’ll have to relocate the gas pedal and therefore the brake pedal. It interferes with the brake booster bracket and might as well scoot the column and gauges. I have 4” of room to move the seat over, too. And new carpet. Plus my vintage air won’t fit but it looks like an Old Air Hurricane will. Im just being stubborn about making it work. Truck was a great driver but could never turn corners despite the c4 suspension.
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-28-2021, 05:45 AM   #467
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Inspiration.
Attached Images
   
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-28-2021, 09:45 AM   #468
Rickysnickers
Senior Member

 
Join Date: Oct 2014
Location: Eagle, ID
Posts: 1,468
Re: Yet another GMC build

What truck is at the bottom, with the interior shot?
Rickysnickers is offline   Reply With Quote
Old 07-28-2021, 12:10 PM   #469
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Quote:
Originally Posted by Rickysnickers View Post
What truck is at the bottom, with the interior shot?
The single turbo engine and the interior go with this truck. A little more utilitarian than I d prefer but still pretty awesome.
Attached Images
 
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-29-2021, 06:10 PM   #470
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Wheelbarrow seems to work. I like that it’s curved. Anything I could’ve made would be all sharp angles. Going to recycle the hump from the firewall as the transmission bump. Then on to relocation of pretty much everything else in the cab.
Attached Images
  
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 07-30-2021, 11:41 AM   #471
layinrocker65
Registered User
 
layinrocker65's Avatar
 
Join Date: Jun 2005
Location: California
Posts: 461
Re: Yet another GMC build

Looks nice. Love the set back
__________________
‘53 GMC COE stock
‘53 Chevy 3100 LSA/TR6060 http://67-72chevytrucks.com/vboard/s....php?t=805949‘
'70 Chevy C10 LWB 350/sm465
‘74 Chevy C10 SWB 5.3/4L80e, Vintage Air, Dakota Digital, US Mags
layinrocker65 is offline   Reply With Quote
Old 07-31-2021, 09:30 AM   #472
Rickysnickers
Senior Member

 
Join Date: Oct 2014
Location: Eagle, ID
Posts: 1,468
Re: Yet another GMC build

Quote:
Originally Posted by OKGMC4 View Post
The single turbo engine and the interior go with this truck. A little more utilitarian than I d prefer but still pretty awesome.
Yeah, it is. I like the roll cage in it though. It appears to be tucked out of the way nicely and he probably has four point belts attached to it. Thanks for the photo.
Rickysnickers is offline   Reply With Quote
Old 08-01-2021, 05:51 PM   #473
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

The gas pedal is pretty much where the brake used to be. I had to move the booster bracket over a couple inches. By grinding the welds on the brake pedal arm, I can now move it to the other side of the swing arm shaft. I put a seat back in and the gas pedal feels comfortable where it’s at but I think the brake pedal is going to be a left foot operation. Driving with both feet doesn’t really bother me any more than using a clutch. I’m just going to leave the column and seat locations alone.
Attached Images
 
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Old 08-01-2021, 05:55 PM   #474
dsraven
Registered User
 
Join Date: Nov 2010
Location: calgary alberta
Posts: 4,866
Re: Yet another GMC build

That would drive me crazy, but, to each their own.
Is there room for your left foot anywhere when not being used for the brakes?
Have you checked local laws for foot and pedal clearance laws, if any exist? Wouldn't wanna find out AFTER doing all that work.
dsraven is offline   Reply With Quote
Old 08-01-2021, 08:03 PM   #475
OKGMC4
Registered User
 
OKGMC4's Avatar
 
Join Date: Oct 2009
Location: Broken Arrow, OK
Posts: 1,078
Re: Yet another GMC build

Quote:
Originally Posted by dsraven View Post
That would drive me crazy, but, to each their own.
Is there room for your left foot anywhere when not being used for the brakes?
Have you checked local laws for foot and pedal clearance laws, if any exist? Wouldn't wanna find out AFTER doing all that work.
Not sure any laws like that exist in Oklahoma. I saw a Ford Fusion at a local car show converted to RWD with a 302 engine. Lol.

Plenty of room. And I can actually hit the brake with the right foot but it feels a little like trying to cross my legs. Might just be me though. My wife sat in it and said it’s fine, but her feet are small. A friend had me help rebuild his triumph spitfire and I can’t even drive the thing unless I take my size 12 shoes off. The stock pedals are so small and cramped my big Ronald McDonald feet hit two pedals at once. Makes braking and shifting super fun. I guess British people have little stompers.
Attached Images
 
__________________
56 GMC BUILD THREAD:
http://67-72chevytrucks.com/vboard/s...d.php?t=368649

69/67 chevy/gmc LS powered unibody:
http://67-72chevytrucks.com/vboard/s...d.php?t=624747

One piece window conversion Blackdiesel style:
http://67-72chevytrucks.com/vboard/s...d.php?t=366078
OKGMC4 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:18 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Copyright 1997-2020 67-72chevytrucks.com