I'm about to replace the 250 in my '68 Shortstep with a stock 350 and a 350 TH. I will be running 235/75/15 tires (28.8" diameter). I would like to hear opinions as to a good all around rear ratio to use--not going drag racing, just want good performance and decent gas mileage. The truck presently has a 3:73 rear and the computer program says I'll be running 3045 rpm @ 70 mph with it.
Whaddya think?
