Since your GMC has the leafs in the rear, is it safe to assume you have the Dana 44 rear differential? If so I believe you will need to swap the entire differential to have rear disc brakes. If you were to switch to a truck 12 bolt differential, I sell the brackets to install disc brakes on that rear with a 5 lug bolt pattern. I may offer a 6 lug rear disc in the future. As an option on rear brakes, you can upgrade to the backing plates, drums and all internals from a '75(?) to '79-'80 K10. They are drums but are 1/2" wider that the '74 and earlier drum brakes
I agree that the 5 or 6 lug debate boils down to what wheels you want to run and their available bolt pattern.
Quote:
Originally Posted by Rob Fisher
Thank you very much for the quick reply.
Like I said there seems to be a ton of information out there and it is tough to find the right stuff. You seem to know your way around this forum pretty well.
Is there any information on doing a rear end swap with disc brakes? I f you can send me in the right direction that would be great.
One other question for you, 5 or 6 lug, which is preferred, there seems to be great debate about it.
Thanks again for your help.
Rob Fisher
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