Here is my points for not wanting OHC they use timing belts which breakhad one break after 3k miles which cause massive internal probs $$$$$$$ OHV you blow a chain you bend of few push rods and you could fix it on the side of the road if you know what you are doing. Both respond well to boost again if you know what you are doing. Seen a few 440s runing twin turbos and they goy really good gas mileage consider they are big V8s OMFG