Super stock springs ?s

I have my car in the repair shop for a rear-end vibration issue. The owner of the shop has informed me that the vibration is due to the pinion angle being incorrect. The pinion is pointing up 4* which only gets worse under acceleration (as the axle rotates up). The shop owner also informed me my car has 2800 lb super stock springs in it from Mancini Racing (1 of the the previous owners added them). So apparently, when the ss springs were installed the pinion angle was not set or adjusted correctly.

So my inquiring mind went to Mancini Racing's website to look up 2800 lb ss springs. Mancini lists multiple springs, by vehicle weight. My question is do all Mopar vehicles use the same spring dimensions (front eyelet to perch to rear eyelet)? For example will the 2800 lb ss springs in my a-body car also fit other car bodies (b-body, e-body, or c-body)?