I built an Sr powered 240 from a shell and switched to a wrx. Only if you feel comfortable completely tearing down a normal car should you switch to a backwards, ass-in-9, retarded boxer motor. No offense to anyone here who thinks they are easy to work on, just stating my opinion. I think they are the most GOD AWFUL designs ever, in which every engineer at subaru is trying to piss me off.
Symetrical design < ease to work on
Go make a friend with a wrx. Work on their car and try not to blow your brain out all over the hood, which can open 90 degrees like a honda but you have to take out the hood prop and maybe damage it in the process.