Im getting closer to start restoring my rear end and I plan on doing alot of cruising.I plan on making small trips,hitting the interstate and doing local cruise ins.My setup that I have is a mild 440-4-speed-391 gears and when I was driving it before it really tached up there when I hit the interstate.I thought about the 323s,then I thought that maybe to high.Just want some opinions what would be the best gear to go with.Thanks,Chris