whats the best engine for both performance and mileage??

superior in what way? Every way? Come on now. Be a help to the thread or take the babble else where. Seriously now. Act your age, not your shoe size.

:finga: The denial in these forums is almost sad. Yes the LS is superior in every single way.

I voiced my opinion the OP in my first post. If he is hellbent on a keeping is car with a crappy mopar engine, he needs a mild engine with nitrous.