The words Hemi "A" body and street car don't generally go together. That said, I'll assume that as a street car you're using some sort of street tires that don't give the sort of grip that racing slicks would. I mention this because as we all know in order for a car to move from a standstill something has to slip. Tires, torque converter for autos or the clutch with manuals. On a hard launch it's easier to control clutch slippage, but tire slippage is lot easier on the wallet and your back [ I really don't much care for changing clutches ]. If you wish to go with a diaphragm clutch two that I know work well are McLeod and Sachs. I've never used a Centerforce, but most people that have seem to like them.