360 or 318

Depends what you ultimately want a 318 can be built to be just as fast as a 360 up in till a point like say 400 plus horsepower. But it's just gonna be less street friendly doing it needs more stall and gear. I'd try to find a low mileage 5.9 magnum or even a 5.2 they both make about the same hp but obviously the 360 has more torque.There both just a cam, header 4bbl upgrade away from making mid 300 horsepower.