Has anyone actually built a power/mileage combination they would like to comment on?
My 1962 Ambassador, with 327 and Flush-O-Manic, got 18, 19 mpg at 65-70mph. It had some absurdly low axle, I don't recall what (in the 2's). It turned under 2000 rpm in the 60's (mph)! I lived in Mass. at the time, the car was from Colorado, and I discovered the reason for the silly axle on my first cross-country road trip (1976, to Bremerton WA). Came in real handy on Route 80!