I have 3.55's and a 460 zf5, I never use 1st, always second. shift @ 2,000 ish and don't bog it. I have my pump turned up and I don't let it smoke at all.
With my GV on (double overdrive), I ran 84mph @ 2,000rpm and got 18mpg going on i10 to SA for the CDD IDI meet. I had to drop the GV a...