1973 340, want more power.

IF you have tall gears now (2:76) put it ins 2nt gear and drive down the freeway. Hold it at round 3000 rpm.
where i raced, i had to drive on the freeway about 50 miles. running at 3000 rpm and having every one pass you was a pain.
Stupid question, while running at 3000rpm you could still tramp on it and pass someone correct??