[Speedbumpauto]

Just from reading between your lines, I think you want more toy and less practicality, within reason. So...400-450 HP and you can do that with the LS engines of larger displacement easily and even later on since they all fit in the same holes. I went more to the extreme on mine since I wanted the same kind of retro hot rod look but if doing it again, probably the bigger LS with forced induction. I also went with durability in a TH400 and a US Gear OD.(they don't make them any more) but doing it again, I'd lean toward the 4L80 with a stand alone. I didn't like the GV because they're only 22% OD and most factory OD's and the US Gear are 30%+. There are 4.11's in the 9 in mine but a 32" tire. Good luck and above all, have some fun with it!