a 3.4" pulley will give around 25-30 hp. going smaller than 3.25" will give too much KR and will result in possible loss of power--more mods will have to be done to lower the engine and incoming air temps. an intercooler will give an incredible amount of power but will require removing the supercharger and costs about 1200$.
www.intense-racing.com will have many awesome upgrades for the 3800 and transaxle. Scott Cook from intense racing also has the quickest front drive late model gp in the world. 670+hp and does the quarter in
[email protected] video of it racing is on the website. these people know everything about 97up gps