what will changing your heads do to a chevy 350?

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  • what will changing your heads do to a chevy 350?


Answer #1 | 18/12 2013 07:31
Umm, from what head to what head? A Vortec from a 70's smog head will increase power significantly. Getting rid of Vortecs and swapping smog heads will kill power. Using 305 heads on a 350 may increase compression enough to cause detonation and require a lower temp thermostat and/or use premium gas. You haven't given us nearly enough info to answer the question any other way but generically.
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Answer #2 | 18/12 2013 11:01
Either increase or decrease hp
Positive: 100 %
Answer #3 | 17/12 2013 20:32
It won't do much if you keep the stock cam/intake manifold/exhaust manifold on an otherwise stock 350. Generally the stock cam is very tame, which seriously cuts into the performance potential of a good set of heads, so consider swapping intake/heads/cam (and taking the time to match the performance of each) at the same time, especially if you're paying for the work to be done!
Positive: 50 %

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