SS springs on an early B-body is a mine field! Mopar Performance never bothered to tell anyone how to do it for some odd reason. I think most people buy the B-body springs since they assume that those are the ones that fit but of course they don't. Same deal with the hangers.

Mancini has the correct parts but you'll have to do some research and measure the parts. It takes a little extra work to build an early B-body car. Some stuff fits and some doesn't.