[joyridin']

I have a .54 sixth gear with 3.70 gears. It cruises in 6th at about 1900 RPM at 70 mph.

With the car weighing 2100 pounds, it has no problem accelerating in 6th gear. If I were to run a .82, i would probably go with 3.23 gears. It is a huge drop from 4th to a .64 fifth.

I would not even think about a 6 speed unless the car was fuel injected and you could run highway RPM's at well under 2000. If you do not have EFI or have a decent cam, you will get stuck with either no first ear, or a 6th gear that is not usable.