Vortec supercharger boost issues?

Def not, its a car specific blower in which they made 2 models of… A 5-6 psi unit that produced 275whp on a stock 5-0 and an 8-9 psi iirc which produced 331whp on a stock 5.0, both not alot of power… My original thought was it haad to be the cheapest unit possible bc of the condition i aquired the thing in lol, BUT it does have the 3.48" pulley… Either way the blower is set up for that car