hi,
if I have an 400 engine from the early 70´ths than have this much lower power than the late 60´ths ! where can I bring power in the "low powered" engines ? change only the intake manifold and the carburator and maybe the camshaft to bring back the horsepower I need ?...what is the "biggest" difference between the early 70ths and late 60ths engine ?
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