i wouldnt drop pullies either. you really dont have much of anything done. get a downpipe or some headers and then THINK about a pulley.
So where is a go place to but a downpipe or headers
2007 Pontiac Grand Prix GT Series III 3.8 Super Charged AL 104's Plugs, 180* T-Stat, Tuned PCM , Custom CAI is complete and installed, AeroForce Interceptor gauge, Smoothflow 3.5 pulley with 0* KR, SSAC SS Headers. 6000K HID