I have a 1960 ford truck and am going to get a 351 engine. Right now I have 370 gears in the ford 9 inch rear end with a 28 spline axles. I'm being told to go with a c6 tranny but I found a chart saying the gears are the same in the C4,5, and 6 trannys so what is the major differance in the 3 transmissions? Also where can I find out what a good combo (tranny and gears) is for this 351 engine???? Help