2001 gt 5 spd. kinda narrowed it to between f-2 from fordchip.com for 275, or 355 for diablo sport cutom modified chip. pretty much finished with mods, only have tri-ax, pullies, 4.10 gears, prochamber, & cat back. no dynos or speedshops worth a @$%* in this area, so pre-burnt is my only option i'd say. mostly just looking to shut off ses light for good, correct speedo for gears, & possibly make a bit more power with timing advance & a/f ratio. any advice, experiences & or problems greatly appreciated.