[tdangle]

One thing to keep in mind is not the road speed but the driveshaft speed. With 4.10 gears you are in the 3K rpm range for the driveshaft. 100 mph in a car/truck with 3.08 gears will have a much lower driveshaft speed. I would suggest leaving it a 2 piece and try out the 4.10 gears you have with the 7004r trans. In overdrive your engine speed will only be around 2K at hwy speeds. That's what I have in my C20.