[quote=scrambler45]I am building a 54 with a 2003 5.3, drive by wire, 4l60e and 75 camaro rear end with 3.08 gears. donor truck had 65K miles. engine, trans, pcm, tac module, throttle pedal, compete wiring harness, fuel injectors and lines set me back 1600. I think the ls based engines are the way to go.
I just noticed your setup. An overdrive with 3.08 gears will probably have your RPM's much too low and your engine will be lugging, unless you're running 38 inch tires, or at 90 MPH. You may want to consider 3.42 or 3.73 gears with that set
I am running 215/60/16s on the rear. the stock for the donor was 245/75/16. The donor ran 683 revs a mile with 3.73 gears. Myu tires run 827 revs a mile. 683 divided by 827 is .826. 3.73 times .826 is 3.08. So the ratio should be right in line with the donor truck. Plus I picked up the tires and wheels and the rear diff from the same guy for cheap.
