[Rick]

A rear end gear swap is a possibility, however this will cost around/about $500. This will work if you are sure that you will be getting what you are looking for. You might also consider some sort of overdrive transmission. You will have to investigate all possibilities with this. My 62, has 3:07 rear axel plus a .78% overdrive. This gives me 1750 RPM at 65 mph. Do the math before spending money.