My 56 f100 is in the planning stages and I am looking at engine and tranny combos. I have a 409 chevy that I could use, but I am sure the gas mileage would suck. FYI I live in rual south east Texas and the closest town is 20 miles away. Houston is a 1 1/2 hr drive. So I want something I can drive with out talking out a loan for a road trip. I have thought of a 300ci ford 6 cyl, a 215 olds or ???? Diesel (just kidding) 4 speed or 5 speed or ? Thanks folks Richard.