Getting ready to replace the 2:73 gears that came in my 8.5" 10 bolt. Engine is 406 SBC, Muncie 4 speed transmission, 29" rear tires, 235 @ 50 roller cam, single four barrel. Car will never see the strip. Will only be driven occasionally. Thinking 3:42 or 3:55 gears, would like to hear what your experience. Yes, I will do the speed vs rpm calculations, but want to hear user comments. Thanks.