Whats the difference in the rear springs between 64-66 and 67-72?

Im looking at CPP's drop springs but would like more than just the 1.5" drop they offer for the 64-66's.

Spring diameter is the difference. The 64-66 springs are a bigger diameter than the 67-72.

I've never noticed a spring diameter difference but the 64-66 spring pocket in the frame is different than 67-72 frame pocket. The later frames have a spring pocket designed for a pig tail spring end, the early frame pockets are not designed for a pig tail so the later type spring will not fit the 64-66 pocket correctly...........

Well that sucks, but thats what I needed to know, thanks!


Looks like coil overs or bags.

What Pat said.
Mike