I have rear discs off a fleetwood, I think it was a 76 or something
I havent gotten them installed yet, but as far as I know its pretty strait forward & you just swap the backing plates for the caliper bracket & bolt the rest of the disc stuff on
Also this may help you find some discs, its a list of 5x5 compatibility
http://67-72chevytrucks.com/vboard/s...d.php?t=234769