Re: 70 GMC 4wd version
I was trying to remember as it was a few years ago on my 71 4wd that I pulled the small block and dropped in a 454 and just had to use big block mounts as they were a bit taller and still ran the big distrib, but you never know what someone else does to modify something before you get it. The frame mod is easy if you can weld.
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Re: 70 GMC 4wd version
Got the 396 66 chevelle oil pan on and it solved my problems. For anyone who looks at this thread later down the road, I used stock sbc motor mounts that came with the frame, and a 396 66 oil pan with no trouble, i have about 1/4 inch of clearance. I did move the stock crossmember forward 2 inches to help with any firewall clearance i might have also so i can use a factory square body front driveshaft.
Starting to make forward progress. Also the boyd welding fuel tank came in. http://i114.photobucket.com/albums/n...psa26ea8e7.jpg http://i114.photobucket.com/albums/n...ps5f7ca2f5.jpg http://i114.photobucket.com/albums/n...psc3566c83.jpg http://i114.photobucket.com/albums/n...ps40266144.jpg http://i114.photobucket.com/albums/n...psccdd50a9.jpg |
Re: 70 GMC 4wd version
Nice to see the car pan worked out for you.
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Re: 70 GMC 4wd version
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Re: 70 GMC 4wd version
Lookin good keep cranking. Frame turned out terrific. The boys tanks are very nice! Good choice.
Chris |
Re: 70 GMC 4wd version
Its been awhile guys, I have been busy putting 1 ton axles in my wheeler an 78 dodge power wagon. But im back it it now. Yesterday I got my trans crossmember modified to work with the 241 transfer case so the front shaft wont hit now. Today I tore apart the front shaft and installed new u joints, and also finally cut my plug wires to length and crimped on the ends, man that was the first time I built my own wires and what a pain in the rear.
On a side nit can someone post a pic of how the front u joint attaches to the dana 44 yoke. Is it u bolt straps or is it strapswith bolts. Thanks in advance http://i114.photobucket.com/albums/n...psah61w486.jpg http://i114.photobucket.com/albums/n...psefgwm2mf.jpg http://i114.photobucket.com/albums/n...pshkriifdg.jpg |
Re: 70 GMC 4wd version
Depends on your diff, one is threaded for the bolts and straps, the othere yoke isn't threaded so the u bolt will pass rt threw. Just have a look to see if threaded or not to see the type.
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Re: 70 GMC 4wd version
What kind of trans crossmember are you using?
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Re: 70 GMC 4wd version
Alright ill take a look. Its the factory crossmember.
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Re: 70 GMC 4wd version
So if i cut the rivets that hold the factory bell housing crossmember thats what you are using for a transmission crossmember?
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Re: 70 GMC 4wd version
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Re: 70 GMC 4wd version
Well today i got the rear ends swapped out......... sorta. I guess the 2 and 4wd spring perch width is different? Csn anyone verify this? i managed to get the 4wd one in the 2wd frame by ratchet strapping the springs closer together, which is fine because its going to scrap once i get the body off, however i wantto do the 4wd correctly.
So i started to grind off all the old perches and bump stop brackets on my 2wd axle. Got about half way then it started to rain so i had to pull the corvette in, and i wasnt about to grind right next to it. So few questions. 2wd vs 4wd spring perch width, different or did the po just screw up mine when he did his homemade axle flip? Where can i buy spring perches to weld on? What should the pinion angle be when i weld on my new perches? Anyone know where i can buy and angle gauge to determine pinion angle? Link? Thanks in advance |
Re: 70 GMC 4wd version
Heres a few pics from today.
Disc brake brackets from captainfab. http://i114.photobucket.com/albums/n...psgqqm1yjs.jpg http://i114.photobucket.com/albums/n...ps8vdzucj0.jpg http://i114.photobucket.com/albums/n...psy0zasetq.jpg http://i114.photobucket.com/albums/n...psmm3vtrrc.jpg |
Re: 70 GMC 4wd version
The spring perches on 2WD vs. 4WD are different. I think the 4WD perch width is like 40" where the 2WD is like 42 1/2" or something. I ran into this a while back on my 4wd build. As far as the pinion angle I measured mine while it was bolted up to the springs before I cut the perches off. Then I bolted the axle up with new perches, centered the axle, set the pinion angle, then welded them onto the axle. I bought a magnetic angle gauge from harbor freight and it works just fine.
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Re: 70 GMC 4wd version
4x4 = 40.5" spring perch. Swapped my 72 Ho52 for a Dana60 from 71. Bolted right up.
Chris |
Re: 70 GMC 4wd version
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Re: 70 GMC 4wd version
Does anyone with a 4x4 rear mind take a tape measure to there diff for me? I need a measurement of where the tube slides into the pumpkinout to the center pin of the leaf perch.
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Re: 70 GMC 4wd version
I'll get you a measurement tomorrow.
Chris |
Re: 70 GMC 4wd version
From where the tube slides into the pumpkin to the middle of spring perch is right at 12". Hope this helps. Trevor
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Re: 70 GMC 4wd version
Sent you a pm with measurements
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Re: 70 GMC 4wd version
Got the new perches tacked in and test fitted, tomorrow ill pull it clean it and paint it, providing i can figure out what im gonna do with shock mounts
http://i114.photobucket.com/albums/n...psvd0178oo.jpg http://i114.photobucket.com/albums/n...psbamjideq.jpg Also seen this truck this weekend, way to tall for my liking, but still a nice looking truck http://i114.photobucket.com/albums/n...psgbpkcrlz.jpg |
Re: 70 GMC 4wd version
The silver/black Chevy is nice, what style shocks are you going with, factory or something else.
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