I'm wondering if all 81-87 G-body's share the same front/rear upper/lower control arms as an '87 G.N. or if there are any differences between them? I want to get a full set prepped and ready to bolt on to minimize downtime while I'm doing bushing & BJ replacement, just don't want to grab the wrong set and waste time/money with parts I can't use. I plan on boxing the rears, but as I found out on my '36 Olds that on an A-Body Skylark/Chevelle there are different lengths depending on years, and I did up a really nice set and went to bolt them to my suspension and found out 68 and down used different length arms than a 69 and up!! DOH! Did up a second set of the correct ones but don't want to go through that again!!