[longbed67]

First off 1967-1972 did not all have the same spindles. 63-70 was one style spindle and then 71-72 was a different spindle, and 73-87 a different spindle again. Based on what I have been told, being that i have the 5 bolt pattern only to confirm for sure, the 1991 3/4 ton C-series 6 bolt rotors should work....with the 1971- 1972 spindle. Although I havent been down to the parts store myself to throw a caliper on the inside to check to make sure, I would suggest going down with a caliper and checking this out, measuring the inside where the races would sit and then check the races that match your setup along with the bearings to double check to make sure everything specs out.