Could someone tell me the difference between 64-67 rear uppers control arms and 67-72 uppers. Is it the length that differs and if so, by how much? Thanks, Steve
Nevermind, I found it. Here is the info if someone is interested. lots of GM A-Body Parts Interchangeability info Upper trailing arms of 1964-67 vintage interchange, and they are 1" shorter, which will not fit into 1968-72 A-cars. 1968-72 A-cars have longer upper arms, and when switching upper arms, be careful here, in which the pinion nose angle might be affected. According to Inside '64-'72 A-Bodies, there are 10 different rear upper control arms offered. Other characteristics include clearance bulges, common with 12-bolt differentials Rear upper control bushing eyes differ, and the positioning of the bushing eyes will differ. 1968-72 rearend housings will have a 3/8" forward positioning, which is farther that 1964-67 rearends.
