Mpg on a mild 360?

RustyRatRod said
My 71 got between 18-21 if I drove it gently. It was a very mild 360 with a TQ, 904 and 3.23s with 275 60s on the rear. It would run 13.90s like it sat, or I could swap in the 4.10s and slicks and it would go 13.60s. Had the Crane magic cam in it.

R.R.R.,wide lobe centers work,for street ability. Cut back on overlap ,work on actual headflow & compression. Watch life, get good.