[66-PMD-GMC]

Originally Posted by FetchMeAPepsi

Let me say it different - if you wanna swap something under a GMC, he can answer it in 10 seconds or less without consulting anything other than experience. Interchanging parts is what he does.

Originally Posted by LVPhotos

So I used CPP axle kit 6to5 70RACK at 31.5" and cost $329

Originally Posted by Captainfab

I posted the info you need in the thread in the 'Engine and Drivetrain' section that you posted in.

You can not install a set of factory 5 lug axles into a '63 to early '70 12 bolt, they are too long. I guess you can as others have, but it is not correct. You would also have to change the backing plates and drums to the ones for the 2-3/4" wide shoes, but then your bearing surfaces aren't in the right location.

Fetch.. gotcha thanks

LV, thanks, I have the axles and all I need, I just need to find the correct housing.

Cap.. just saw that post, thanks. With that info I will have to say that the 70 diff must be an earlier than 70 diff because it is shorter.. my axles and parts from the leaker 12 bolt must be later.