with the 62mm your supercharger is turning 22000 rpm.. the max tested if my memory servers me right for the crossfire supercharger is close to 27000 rpm but safe in under 24000,, with the 62 mm your boost/psi should be 19#,,also no one makes anything smaller than the 62mm as far as i know,, and i learn new stuff every day ,,
with my v8 stock is 6# i am running 15# of boost , with a stacked pulleys jim