Pulley Question

I have a P1SC on my 98 Trans Am. Engine is bone stock, I do have Pacesetter Long Tubes/3" Off Road Ypipe and a 3" cat back with a dynomax bullet muffler.

My question is...what boost level is the 3.2" D series pulley with the stock P1SC crank pulley(not sure what size that is off the top of my head). I was in DE seeing 5-6# of boost with the setup in the 1st paragraph and now that I'm in Las Vegas, I see 3# of boost. The car runs great and one of the guys that is part of the LVFbody club road in the car and was impressed how it pulls...but I want more boost out of it 6-8 would be ideal for me. Thanks in advance!