The IFS unit is basically the same starting in 1963 through 1987 on pickups and a few years more on Suburbans and a couple other models.

Disk brakes became standard equipment in '71 or '72 and all disk brake 2-wheel drive trucks that use this IFS are 5-lug.

If you use the crossmember from a '63 through '70 you will have drum brakes with 6-lugs.

That's the easy part. The hard part is that the frame on your truck is wider than the IFS was designed for and this swap will require some cutting and welding.


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...