1971 302 upping horse power?

I have a 1971 ford Torino wagon. Has a 302 with auto trans. No exauhst. Motor has mild cam and bored.30 over with a stock 2 barrel carb. I wondered how much horse power a new intake manifold with a 4 barrel carb will Ruffley add. And how much headers and exauhst would add also. Just looking for a ruff estimate

This is now a bored out engine. Your entire build should be based on the dynamics of your new specs.

What kind of intake and carburetor you want to go with? Type of exhaust setup with either long or short headers? Just saying "4 barrel intake and carburetor w/headers and exhaust" is too vague and generic to give you any kind of sensible answer my friend.

Do not know the exact numbers, but moving to 4 barrel and an upgraded intake should provide a very noticeable performance increase. Since you are currently running no exhaust, I do not know how much new headers and adding an exhaust would add.

Talk to the guys at www.summitracing.com they are intimately familiar with all things pertaining to American V8's.

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