The 3800# B/E body length SS springs have a longer rear segment than other SS springs. I ran them on my Charger (with extended front hanger, all SS springs have the same A-body length front segment and require them on B/E body cars) and I did not have to move the rear hanger. If you're running the original A-body style 002/003 SS springs on a B body, you need both the extended front hanger and relocation of the rear hanger.
