Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - gas mileage V6 vs V8
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Old 02-01-2008, 11:33 AM
454C10 454C10 is offline
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I had ran 9.5:1 cr with that cam that size in a sbc 350cid with stock iron heads in a 4000 lb truck with a 3.08 gear and auto trans. Took 93 octane.

You should ok with an extra 0.5:1 since the heads are aluminum and are fast burn heads (need less total timing). and you have more gears.

I predict mpg should be the same on the highway, but 2 mpg less around town due to the size of the cam.
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