Better set of new Hi Po rear leaf springs up scope
Sounds like you have the original 5 leaf 318 or smaller motor springs on the car, yes?
Even if they are the original 6 and 7 leaf factory H.D. springs they are how old? work grin
Buy new good ones up wrench twocents

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)