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Old 04-13-2011, 03:19 AM   #76
LostMy65
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Re: My 66 Service Truck Build Thread

Thanks John,

I pulled the Eaton back in Feb, and my truck just sits there.
I'm so missing my time with my truck.
I anticipate getting some time in May.
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Old 05-26-2011, 01:44 AM   #77
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Re: My 66 Service Truck Build Thread

yes, I'm still alive.

I have just been so busy with work.
It's a blessing and a curse.

I'm going try and get something done this Memorial weekend - pick up where I left off in February on swapping out the Eaton for the 14bolt.

CaptainFab made me some perches that will fit the larger diameter axle of the 14bolt.
I also need to get some new u-bolts made up at this Spring-shop here in Portland.

I'm still just swamped work-wise, but I've been just aching to get back out there and get greasy.
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Old 05-26-2011, 01:53 AM   #78
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Re: My 66 Service Truck Build Thread

Good to hear from you. I figured you must be busy. I've been slammed with work as well. Good luck with making some progress this weekend.
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Old 05-28-2011, 10:32 PM   #79
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Re: My 66 Service Truck Build Thread

14 Bolt Ready to grind off Leaf Spring Perch's:

.

Leaf Perch's and Shock Mounts ground off:

.
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Old 05-28-2011, 10:42 PM   #80
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Re: My 66 Service Truck Build Thread

Here is CaptainFab's Trailing Arm Perch - Fits Perfect:

.

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Old 05-28-2011, 11:06 PM   #81
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Re: My 66 Service Truck Build Thread

This is a Service Truck, and the Box is really heavy, so I won't be removing it for this axle swap.
I don't want to be doing this from under the truck, so I set-up kind of a jig to line everything on the Eaton up.
I nailed 2x6's to my shop floor so they won't budge.
I traced the Eaton's Trailing arm perches U-Bolt holes.
Then I will use this for getting CaptainFab's new Perches lined up on Corp 14-Bolt to match the Eaton perch location.

.



.
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Old 05-28-2011, 11:27 PM   #82
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Re: My 66 Service Truck Build Thread

I scribed and cut a piece of scrap particle board at the angle that I will need for setting the 14-Bolt at the same angle as the Eaton.
I'm done for the day, - I took 3 advil, and will likely sleep good tonight.
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Old 05-28-2011, 11:50 PM   #83
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Re: My 66 Service Truck Build Thread

Your well into your conversion and too bad you don't live closer to me, I have an extra GMC 1 ton frame that would have been lots less work.
GMC 63-66 came only with leaf springs and my 14 bolt 3.42 geared rear out of a 79 diesel GMC bolted right in.
The front suspension did too.
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Old 05-30-2011, 01:24 AM   #84
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Re: My 66 Service Truck Build Thread

I got the 14-Bolt up on the jig today and started taking some measurements.

I noticed the pinion is off center side to side by about 1 inch.

I wondered why, and have been searching these forums.

This seems to be the reason posted here:
Quote:
Originally Posted by sneakysnake View Post
Its to keep the needle bearings moving around. If the driveshaft was perfectly straight the needles in the Ujoints would cut gooves from being in the same spot.
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Old 05-30-2011, 08:12 PM   #85
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Re: My 66 Service Truck Build Thread

I got Captainfab's Perches tacked.

Pinion angle is set the same as it was on the Eaton.





I didn't get a whole lot done this weekend.

I need to run down to Oregon Spring Company tomorrow and get new U-Bolts made.
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Old 05-30-2011, 08:53 PM   #86
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Re: My 66 Service Truck Build Thread

wanna make me a deal on the electronic distributor off that 250?
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Old 05-30-2011, 09:59 PM   #87
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by snacob14 View Post
wanna make me a deal on the electronic distributor off that 250?
Member rustyrodknocker got that from me some months back.
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Old 06-01-2011, 12:20 AM   #88
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Re: My 66 Service Truck Build Thread

If anyone else decides to swap out their eaton for a 14-bolt GM Corp FF, Captainfab's Perches/Saddles work perfect.
I got the u-bolts made today and bolted up the 14-bolt to the trailing arms.



For the panhard bar, I cut the bracket off the Eaton and welded it to the 14-bolt.

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Old 06-01-2011, 01:22 AM   #89
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Re: My 66 Service Truck Build Thread

It's good to see you making some progress.

I'm glad to hear that those trailing arm mounts worked out correctly.
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Old 06-09-2011, 12:52 AM   #90
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Re: My 66 Service Truck Build Thread

I went ahead and put new shoes, cylinders, springs, and seals on this 14-bolt as long as I was putting it in. It's all mounted and u-bolts torqued to 175.
I went ahead and put in new u-joints also.
Emergency brake cable is also all hooked up.
All I have left is the the brake lines, and then bleeding.
I will do that this weekend.

My wife is anxious for me to get this thing rolling so I can go get 3 tons of wood pellets for the winter - they're on sale at wilco.
Yeah, Sure... she says the truck is ugly, but still wants me to get it going to take care of things on her honey-do list.

I also hope to get out to see jimmydean next week to pick up his rear bumper.

I'm reading up on patch panels, and had a question;
If I get this:
http://www.topbananaparts.com/servle...c-truck/Detail
Will I not need the inner rocker panel because it's already part of it?

(from 198plus's thread:
Quote:
Originally Posted by 198plus View Post
Some progress this evening finally, inner rocker's zipped up.



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Old 06-10-2011, 12:14 AM   #91
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Re: My 66 Service Truck Build Thread

That is correct. You will not need a inner rocker in addition to that piece. I'm really glad they came out with that piece for our trucks. That one piece covers the majority of the rust issues with our trucks without having to buy 2 floor sections and only use a portion of each. This piece also makes it easier to keep that area straight, versus welding 2 pieces together.
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Old 06-12-2011, 10:18 PM   #92
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Re: My 66 Service Truck Build Thread

I'll be swapping out my front later this summer.


Given this info here:
Quote:
Originally Posted by Captainfab View Post
The WMS to WMS measurement on the '63-early '70 rear differentials is 62". The late '70-'87 rear differentials are 63 1/2". ...clip...
Is the front end of a 73-87 also 1.5" wider than the 60-72 ?
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Old 06-13-2011, 09:40 AM   #93
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by LostMy65 View Post
I'll be swapping out my front later this summer.


Given this info here:


Is the front end of a 73-87 also 1.5" wider than the 60-72 ?
I put a 79 front suspension clip in my 66 and the wheel/tire look like they sit in the same spot. But then again we are talking 3/4" per side differance. I had the motor out on my first swap and in on the second.
Definately easier with no motor.
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Building Genuine Pontiac Firepowered cars and trucks for several decades.

Why Pontiac?? That's just me daring to be different.

Projects..

61 C40 crew cab dually under construction and of course, motivated by Pontiac.

63 C10 Short Wheel Base fleetside (The Pro-Street) currently under reconstruction.
440CID RA-V 2X4 fed 1200+ HP Pontiac

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Old 06-19-2011, 02:43 PM   #94
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by 66-PMD-GMC View Post
I put a 79 front suspension clip in my 66 and the wheel/tire look like they sit in the same spot. But then again we are talking 3/4" per side differance. I had the motor out on my first swap and in on the second.
Definately easier with no motor.
I will have to do mine with the motor in.
Right now, with the new 13" brakes on the 14bolt, the truck is stopping great. So I'll probably wait until the front brakes need replacing before doing the swap.
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Old 06-19-2011, 02:54 PM   #95
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by 66-PMD-GMC View Post
I put a 79 front suspension clip in my 66 and the wheel/tire look like they sit in the same spot. But then again we are talking 3/4" per side differance. I had the motor out on my first swap and in on the second.
Definately easier with no motor.
I will have to do mine with the motor in.
Right now, with the new 13" brakes on the 14bolt, the truck is stopping great. So I'll probably wait until the front brakes need replacing before doing the swap.
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Old 06-19-2011, 03:37 PM   #96
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Re: My 66 Service Truck Build Thread

I used a cross member for a trans under the balancer, left the top bolts on the motor mount perches and the motor mounts bloted up so the motor wouldn't tip over.
I unbolted the lower bolts for the perches that attach to the cross member.
After pulling everything out I found out all I had to do was swap A arms with spindals and rotors... etc....
3/4 to 3/4 is a direct swap.
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Building Genuine Pontiac Firepowered cars and trucks for several decades.

Why Pontiac?? That's just me daring to be different.

Projects..

61 C40 crew cab dually under construction and of course, motivated by Pontiac.

63 C10 Short Wheel Base fleetside (The Pro-Street) currently under reconstruction.
440CID RA-V 2X4 fed 1200+ HP Pontiac

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Old 06-19-2011, 04:31 PM   #97
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by 66-PMD-GMC View Post
I used a cross member for a trans under the balancer, left the top bolts on the motor mount perches and the motor mounts bloted up so the motor wouldn't tip over.
I unbolted the lower bolts for the perches that attach to the cross member.
After pulling everything out I found out all I had to do was swap A arms with spindals and rotors... etc....
3/4 to 3/4 is a direct swap.
Thanks.

From the threads I've read, I had just figured I'd swap the whole front cross member. But your post got me thinking; I searched the forums and found a couple threads on the subject:

http://67-72chevytrucks.com/vboard/s...d.php?t=384196
http://67-72chevytrucks.com/vboard/s...d.php?t=357610
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Old 06-19-2011, 07:59 PM   #98
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Re: My 66 Service Truck Build Thread

After checking auto-zone, checker O'Riely's and NAPA I found the same part number for 63 3/4 ton and 79 3/4 ton A-arm shafts. In fact they used the same A arms for over 20 years.
They bolt directly in. They are the same upper and lower. I have a 79 1/2 ton suspension that bolted directly to my 63 cross member with no problem whatsoever.
I have no idea as to the interchangeability between 1/2 and 3/4 ton.
The reason I had to use the cross member on the 66 is because I used the 79 motor mount plates and the contour and hole pattern is different on the different year cross members where the plates bolt on. The 79 plates made my Pontiac transformation a bolt in deal.
If I hadn't used a Pontiac motor in my build I may have opted to leave the cross member in and not change it at all.
Frankly, you could pull your spindles only and bolt them to the 63-66 A arms.
I could do that swap in 3 hours total.
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Building Genuine Pontiac Firepowered cars and trucks for several decades.

Why Pontiac?? That's just me daring to be different.

Projects..

61 C40 crew cab dually under construction and of course, motivated by Pontiac.

63 C10 Short Wheel Base fleetside (The Pro-Street) currently under reconstruction.
440CID RA-V 2X4 fed 1200+ HP Pontiac

Sold
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Old 06-25-2011, 12:55 AM   #99
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Re: My 66 Service Truck Build Thread

Quote:
Originally Posted by 66-PMD-GMC View Post
After checking auto-zone, checker O'Riely's and NAPA I found the same part number for 63 3/4 ton and 79 3/4 ton A-arm shafts. In fact they used the same A arms for over 20 years.
They bolt directly in. They are the same upper and lower. I have a 79 1/2 ton suspension that bolted directly to my 63 cross member with no problem whatsoever.
I have no idea as to the interchangeability between 1/2 and 3/4 ton.
The reason I had to use the cross member on the 66 is because I used the 79 motor mount plates and the contour and hole pattern is different on the different year cross members where the plates bolt on. The 79 plates made my Pontiac transformation a bolt in deal.
If I hadn't used a Pontiac motor in my build I may have opted to leave the cross member in and not change it at all.
Frankly, you could pull your spindles only and bolt them to the 63-66 A arms.
I could do that swap in 3 hours total.
Thanks for all the research and advice.
I may just go that route.
Either way, I'm going to wait until the rainy season to do the front.
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Old 06-25-2011, 12:59 AM   #100
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Re: My 66 Service Truck Build Thread

I had planned on trying to get by and see Jimmydean and pick up his bumper, but wife over-ruled; she says I have to do her honey-do list first.

At HomeDepot picking up plywood:
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