I was on a site www67-72Chev trucks.com went to a dicussion on the dic brake up grade for the early 60s trucks, they were talking about using parts from the early 70 up to mid 80s and this side discussion or thread I guess they call it starts on how to use late 80s early 90s spindle/rotor/caliper with a 68 3/4 ton lower A frame because it has the same size dia. hole for the lower ball joint it was interesting but not quite complete, so someone has done it, maybe we will hear more soon.
