Any all motor n/a motor is going to be more reliable than any boosted motor unless the car is boosted stock such as....sti, evo, gs-t.......ETC bottom line I wouldnt mind doing a sohc turbo your going to wax coupes with swaps if they are stock but with a few bolt ons and a good drive compared to a boosted coupe with 7-10psi its going to b pretty even race