I have a 2002 Regal GS with the following mods CAI, IntensePCM with 2* of timing, PLOG, 3" DP and Magna catback, AL 104, 180 Tstat but I'm still running the stock 3.8 pulley. I have a MPS with a 3.5 pulley. Can I safely go ahead and drop the pulley size now or should I wait until I get a Aeroforce pillar gauge to see if I'm getting any KR now. IMO the mods I have in place now I shouldn't have or very little KR