Finished building my 51 Chevy/Shortbed last year, drove about 1500 miles this summer. My set up is, 4.3v6 Throddle body fuel injection, 700r4 Trans., 272 rear/end highway gears. At 60 miles per hour she will run around 1900 to 2100 RPM consistently gives 23 miles per gallon. Needless to say I am very happy with the power and performance of this build. Its just so much fun to cruise with it, highway or back roads.