GO WITH SUBARU POWER. You won't be disappointed, in fact your expectations will be surpassed. I cannot say how much nicer the Suby engine setup will make your car. If you want A/C and are dropping the bucks for this nice ride go the extra bit and do it right with a Subaru engine. I am working on a big 2276 Air cooled type 1 engine right now for another project car I have and it reminded me of how much better the Subaru engine package is. Please do yourself a favor and go Suby! You will love it.