yeh thanks for all the info people i really appreciate it, and its exacully what i was looking for.
as for the power i am chasing would be between 300 and 350rwkw, so from what ive heard this shouldn't stress the rb25 alot.
the reason why i asked this question is that as we all know a rebuild could cost more than full high mount setup, so yeh i think we get the drift.
once again cheers, and keep the info roling as there could be other noobie's out there looking for this kinda stuff