Ok. I've been hunting for V6 options for... and hour at most. This is the most promising thing I've found. It's ultra light, has good potential, streetable, decent MPG, and would alow for a DARN good weight distrobution as no FMIC is required and the block itself much lighter than any cast V8 block.
http://www.nsxprime.com/FAQ/Performance/basch_boost.htm
Now.... Tranny would be an issue. Gotta make a conversion plate. I have no idea how hard that is, custom mating a tranny to an engine.
Ok, shoot it down please. I'm looking for a real argument against it.... ok.. so it costs a pretty penny i'm sure.
EDIT: Here's a "race built" motor for 12k. It sounds like it's all well done, just gotta wonder why he's selling it with that much invested.
http://www.nsxprime.com/forums/showthread.php?t=58197