WTB: P-1SC pulley --> 3.25"/3.0"

Looking to buy a smaller pulley for my P-1SC, currently has a 3.6" on it. I have been told the P and D series pulleys both work on my P-1SC - is that right? Looking for 12psi at 6000rpms, and with my heads fully ported and imrc's deleted on my 98 cobra I am flowing alot more air through my heads; so I'm thinking I will need a 3.25" or 3.0" to see 12psi at 6000rpms.... any thoughts?? Let me know what you have....also looking for an intake pipe to replace the stock plastic one from ati (WMS intake tube.....)
thanks - stevet