The fuel systems on the 96-98 V6 are return style, so sticking with 96-97 wiring and computer will cut down on the work. I would go with the 99+ longblock for the obvious power reasons and a T-45 for a trouble free tranny(compared to the 3650). You will have to have the PATS reflased to the computer that you use. You can have a locksmith program a key for you, take it to Ford, or reprogram the keys it has yourself-I don't have a source on this one though. Other than that you will only need the 96-98 engine w/ map and egr valve and pipe, engine harness and MAF, exhaust and hangers, 96-98 coils, alternator, brackets, hoses, etc. I looked into this for a 98V6 I owned as a daily driver a year or so ago, but then I sold it and bought my car for $4200(w/75K GREAT cond.). So honestly I would find a steal on a 96-98 GT and do the headswap for a whole lot less than the conversion. Swap would be fun IMO but only if I had money to throw around. Oh yeah, about ins., my insurance is only $98 a month through Progressive.