Need Help Several Dumb Questions
 

Well everyone my project is about to change and I need some quick info:

My 71 GMC measures in at 22 ft long the new one I am looking at is a 67 SWB what is the true measurement of length on it my garage is only 17.5 ft long and if I can fit her in my wife might forgive me. She accepts Orange being outside only because it was her granfathers.

My 71 has a posi 3.73 12 bolt in it is it possible to just switch the whole gear set out on a non-posi truck, or will I have to switch out the whole rear end and more since it will be going from a GMC to a Chevy.

Lastly how big of a nightmare will it be to take the front end off the GMC this would switch it from 6 lug drum to 5 lug disks. If I do this I realize I will have to switch the whole rear end to make her all 5 lug.

Any help is appreciated this was one of those spur of the moment changes I had not planned for that I am sure will cost more $$$ to the project but what ya going to do :lol:

Re: Need Help Several Dumb Questions
 

Jeff,

I got 16' give or take a couple of inches on my 68 short step(you owe me it wis raining!) Funny thing, i am in the middle of swapping the whole front end disc for a 80 model truck with power brakes. I went back & forth deciding to swap spindles or the whole thing. Since the engine is comming out(305 has a bad bottom end) i am definatly going for the full Monty. With the engine in, it looks to be a pia, but i bet several guys have done it here. I am looking for a posi rear end and headed to the junk yard whenever the rain lets up.

We fired up the newely built 350 on the floor of the garage last noght..........ahhhhh, what a beautifull sound!

RD

Re: Need Help Several Dumb Questions
 

If the 67 has 3.73's in it, you can just leave the pinions in, and swap the carriers. You have to check your backlash though.

Re: Need Help Several Dumb Questions
 

I might be able to help with the 6 to 5 lug rear end. Just remove the axles and send them to Moser in Indiana. Just tell them the pattern you want and they will re-tap YOUR axles to that pattern. With shipping I think it was less than $120.00. Much easier than buying and swaping rear ends.
Gary