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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-13-2015, 11:12 AM   #26
JJorgensen52
Simple? What's simple?
 
JJorgensen52's Avatar
 
Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
Re: Hydroboost into a 67-72

The answer is the hydroboost came out of a metric brake square body truck - diesel or 3500 series, '81 - '91 (mine was an '87). Hydroboost first appeared in '75 to my knowledge, any square body truck unit should work out for this.

And as above, Astro/Safari and Express/Savana vans are pretty readily found in junkyards and many have hydroboost units in them.
__________________
CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder)
JJorgensen52 is offline   Reply With Quote
Old 08-13-2015, 12:08 PM   #27
Billyburban
Registered User
 
Join Date: Nov 2013
Location: Oxnard,ca
Posts: 93
Re: Hydroboost into a 67-72

Thanks for getting back to me. I have a 70 suburban I picked up a hydrobost off the van with master cylinder with proportion valve now to figure out the plumbing. Dose any one know the thread patterns for the stock 70 Chevys so I can purchase the adapters. CPP sells a kit for $115.00 an I don't want to spend that much money on fittings that may cost $30 bucks.
Billyburban is offline   Reply With Quote
Old 08-13-2015, 12:12 PM   #28
JJorgensen52
Simple? What's simple?
 
JJorgensen52's Avatar
 
Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
Re: Hydroboost into a 67-72

Quote:
Originally Posted by Billyburban View Post
Thanks for getting back to me. I have a 70 suburban I picked up a hydrobost off the van with master cylinder with proportion valve now to figure out the plumbing. Dose any one know the thread patterns for the stock 70 Chevys so I can purchase the adapters. CPP sells a kit for $115.00 an I don't want to spend that much money on fittings that may cost $30 bucks.
Referring to the power steering lines?
__________________
CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder)
JJorgensen52 is offline   Reply With Quote
Old 08-13-2015, 12:37 PM   #29
Billyburban
Registered User
 
Join Date: Nov 2013
Location: Oxnard,ca
Posts: 93
Re: Hydroboost into a 67-72

The ones that go here also the Power steering reservoir
Attached Images
 
Billyburban is offline   Reply With Quote
Old 08-13-2015, 12:57 PM   #30
JJorgensen52
Simple? What's simple?
 
JJorgensen52's Avatar
 
Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
Re: Hydroboost into a 67-72

Quote:
Originally Posted by Billyburban View Post
The ones that go here also the Power steering reservoir
If memory serves, they're 5/8"-18 pressure side and 11/16"-18 return (inverted flare nuts), and 5/8"-18 into the pump, but not 100% on that ... I would double check.
__________________
CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder)
JJorgensen52 is offline   Reply With Quote
Old 08-14-2015, 09:58 PM   #31
Ozzy2013
Registered User
 
Ozzy2013's Avatar
 
Join Date: Oct 2013
Location: Elkton
Posts: 693
Re: Hydroboost into a 67-72

I would save it they are a great set up and not cheap rebuilt or new hell if it was good ill buy it from you for a spare if you dont want it
Ozzy2013 is offline   Reply With Quote
Old 08-14-2015, 10:07 PM   #32
Ozzy2013
Registered User
 
Ozzy2013's Avatar
 
Join Date: Oct 2013
Location: Elkton
Posts: 693
Re: Hydroboost into a 67-72

Quote:
Originally Posted by JJorgensen52 View Post
I did some research on this a while back, and it seemed like every thread I found talked about drilling holes in the firewall or other modifications that made this swap difficult to do.
In looking at donor trucks, it seems like only the metric (1980+) trucks had the type of booster I'm working with here.

Anyways, some pictures:

Comparison between an unmodified '87 hydroboost bracket and my '72 power brake booster


Lining up the center holes puts the pushrod in the center of the hole in the firewall. I should note that the hydroboost had two pressed-in studs in the center holes, which I popped out.


Using two snug fitting bolts and a welding clamp, I carefully lined up the two holes and marked for the other holes I needed. It's tough to see here, bu there was a stamped bend in the top of the hydroboost, which I pounded flat prior to marking (just below the top holes)


After drilling three new holes and some cutting and grinding, this is what I came up with. The cut on the bottom right was to allow me to bend the bracket out slightly to clear the flange around the steering column on the firewall.

Bracket dry fit on my '72 cab


And here's the donor hydroboost bolted in place



I had to make zero modifications to the firewall, except pulling out the original rubber linkage boot.

The photo doesn't show, but mounted like this the hydroboost pushrod is about 5/8" too short (and offers no adjustment). Unfortunately it's a smaller diameter than the adjuster end on the 67-72 style pushrod, so either I will cut and thread the rod and thread a piece of tubing to make an adjuster of my own, or I'll modify the pedal to move the pivot closer to the firewall.
Did mine the same way no need for any brackets and its clean and looks factory .I just welded two brake push rods together and made it adjustable .Love these hydroboost!
Ozzy2013 is offline   Reply With Quote
Old 03-24-2016, 08:58 PM   #33
Shack
Registered User
 
Join Date: Feb 2016
Location: Elizabeth City, NC
Posts: 1
Re: Hydroboost into a 67-72

Quote:
Originally Posted by JJorgensen52 View Post
Since I was using the square body lines, I mounted it on the front cross member just like they do. I used the square body cross member for the sway bar mounts, but the same position will work on a 67-72 cross member no problem




I happened to have a second '67 truck harness laying around, and the harness - prop valve wire is made in two pieces with a connector where it leaves the main harness. By pulling that piece off my spare harness, I was able to plug into the extension already on the '72 and reach the prop valve on the cross member no problem.
I know I'm resurrecting an old thread but I cannot for the life of me find that proportioning valve anywhere. Where did you get it and what's the p/n? Thanks in advance.
Shack is offline   Reply With Quote
Old 03-24-2016, 09:25 PM   #34
JJorgensen52
Simple? What's simple?
 
JJorgensen52's Avatar
 
Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
Re: Hydroboost into a 67-72

Quote:
Originally Posted by Shack View Post
I know I'm resurrecting an old thread but I cannot for the life of me find that proportioning valve anywhere. Where did you get it and what's the p/n? Thanks in advance.
It's from Inline Tube, their part # PR102.

LINK
__________________
CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder)
JJorgensen52 is offline   Reply With Quote
Old 07-07-2017, 12:54 AM   #35
Whitey__62
Registered User
 
Join Date: Aug 2012
Location: Edmonton, Alberta
Posts: 8
Re: Hydroboost into a 67-72

Any chance we can get the pictures working again?

Looking to do this swap shortly on my 68 C30. Seems like this will help me out a lot.

Are the hydroboost on covered with 80-91 square bodies or do the newer body styles have the same brackets?

Thanks.
Whitey__62 is offline   Reply With Quote
Old 07-07-2017, 01:55 PM   #36
jeffahart
Senior Member
 
jeffahart's Avatar
 
Join Date: May 2012
Location: Scottsdale, AZ
Posts: 1,880
Re: Hydroboost into a 67-72

Quote:
Originally Posted by Whitey__62 View Post
Any chance we can get the pictures working again?

Looking to do this swap shortly on my 68 C30. Seems like this will help me out a lot.

Are the hydroboost on covered with 80-91 square bodies or do the newer body styles have the same brackets?

Thanks.
If Jjorgensen52 does not come back with images I can augment (looks like the photo bucket people are holding images for ransom!). I just completed an install off an 85 cucv into my 70. Not much to it, though there are a couple small items you need to consider. What axle are you running up front for your discs. I do think it is smart to get the master that matches the booster.
__________________
White K20
jeffahart is offline   Reply With Quote
Old 07-08-2017, 01:19 PM   #37
Whitey__62
Registered User
 
Join Date: Aug 2012
Location: Edmonton, Alberta
Posts: 8
Re: Hydroboost into a 67-72

Quote:
Originally Posted by jeffahart View Post
If Jjorgensen52 does not come back with images I can augment (looks like the photo bucket people are holding images for ransom!). I just completed an install off an 85 cucv into my 70. Not much to it, though there are a couple small items you need to consider. What axle are you running up front for your discs. I do think it is smart to get the master that matches the booster.
Yea it seems that anyone in the forums using the Photobucket group has no rights to share their own pictures, funny how that works!

I will be matching the master with the front brakes.

I have a 68 C30 high GVW that I will be swapping a 84 CC C30 single wheel High GVW crossmember/brakes. I'll find a 1ton of the same GVW to get the hydroboost, the plan is to keep it a true 1ton but with better brakes and lowered. Should make for a nice tow rig.
Whitey__62 is offline   Reply With Quote
Old 07-09-2017, 12:25 PM   #38
weq92f
Registered User
 
Join Date: Oct 2016
Location: Dallas Texas
Posts: 2,845
Re: Hydroboost into a 67-72

Dang! The PB fiasco beat the crap out of this thread!

Not going to be an easy fix ( for this and soooo many other threads across the Net ) either unless PB relents.

-klb
__________________
67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi
07 335 sport turbo 6sp
94 Trans Am GT LT1 6sp posi -- sold after 22yrs
99 540 sport V8 6sp -- sold
73 240z L24 4sp -- given to friend
68 C10 step 350/350 3.73 open -- sold
weq92f is offline   Reply With Quote
Old 07-09-2017, 12:33 PM   #39
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,152
Re: Hydroboost into a 67-72

All, re the PB issues...its a simple fix...dont use PB...

Save your images to your local computer, then upload them from your local computer...

PB and others are simply trying to maximize revenue, using your own pics as assets...just dont use PB or other file sharing environments...
AussieinNC is offline   Reply With Quote
Old 09-12-2017, 07:03 PM   #40
JJorgensen52
Simple? What's simple?
 
JJorgensen52's Avatar
 
Join Date: Apr 2007
Location: Southeast CT
Posts: 1,472
Re: Hydroboost into a 67-72

Hey guys:

Yes I still have all the images, and I am hoping to start restoring them all when I get home from my current work trip. Sorry for the inconveniences, meantime. Photobucket cutting the links has made it hard to determine what all of them were, so it is going to take me a little time.
__________________
CURRENT
'50 GMC 100 shortbed Gen IV 4.8 LS - 4L65E (Secret truck, Shhh!!!) Build
'63 Buick Wildcat Coupe 401ci Nailhead (Very much in pieces) Photos
'66 Impala SS convertible 327-QJet-glide (4 speed swap one of these days...) Photos
'69 CST/10 4x4 SWB Stepper 350 2bbl - NV4500/NP241C (Broken Truck!)
'72 Sierra Grande 2WD LWB fleetside 350-TH350 Refresh
'99 K2500 Silverado RCLB 5.7 Vortec - NV4500/NP241C (Daily)
'99 K2500 Suburban 7.4 Vortec - NV4500/NP246 (still working out the bugs)
SOLD
'71 Custom/10 2WD LWB fleetside - '72 GMC K/3500 Dually (Sold to redryder)
JJorgensen52 is offline   Reply With Quote
Old 09-12-2017, 07:10 PM   #41
Whitey__62
Registered User
 
Join Date: Aug 2012
Location: Edmonton, Alberta
Posts: 8
Re: Hydroboost into a 67-72

Quote:
Originally Posted by JJorgensen52 View Post
Hey guys:

Yes I still have all the images, and I am hoping to start restoring them all when I get home from my current work trip. Sorry for the inconveniences, meantime. Photobucket cutting the links has made it hard to determine what all of them were, so it is going to take me a little time.
Great!! Look forward to the updates. In the process of slicing the parts now. So that would be great.
Whitey__62 is offline   Reply With Quote
Old 09-12-2017, 08:11 PM   #42
AussieinNC
Moderator
 
AussieinNC's Avatar
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,152
Re: Hydroboost into a 67-72

Quote:
Originally Posted by JJorgensen52 View Post
Hey guys:

Yes I still have all the images, and I am hoping to start restoring them all when I get home from my current work trip. Sorry for the inconveniences, meantime. Photobucket cutting the links has made it hard to determine what all of them were, so it is going to take me a little time.
There is a work around for the photobucket image lock on shared images...the user needs to install a plugin program into their chrome or firefox browser...

See my previous post:

http://67-72chevytrucks.com/vboard/s...d.php?t=746054

No fix yet for Internet Explorer...
AussieinNC 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 11:24 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com