The stock fuel pump will not be enough for the 3.5" pulley. I would recommend the GT500 pumps over the BAP. I run my plug gap at .032. You will need a shorter belt also. With the 3.5" pulley, I use a NAPA 061031 belt. You will also have to go with the Competition air intake which includes an upgraded MAF or equivalent. Also don't forget about your tune, it will have to be adjusted for the new set up. Good Luck with your upgrade. You're gonna love it.
2008 Vapor Silver GT, 5 Spd Manual
Brenspeed Stg 1 Edelbrock E Force, Liberty built 3650 trans
w/26 spline input shaft, N2MB WOT Box, GT 500 Fuel System, Kooks Long Tubes, Dynotech Drive Shaft, 3:73 Gears, Steeda UCA & LCAs, BMR LCA Relocation Brackets, Exedy Mach 500 clutch, Nitto Drag Radials
"RWHP - enough to get from 0-95mph in 7.61 seconds"