just a quick hijack. i have decided on using 3 to 1 diff gears in my car. with a 31 inch tyre, this gives approx 2100rpm at 65. this will be the working setup ( towing a car trailer. ) one gearbox i was fairly keen on using is out of a nissan cabstar. this will give 5 gears, with a .73:1 overdrive. the only drama i have is that it will run the engine at 1650-ish rpm at 70 ! seems a bit slow. the cabstar box is as strong as buggery, and easy to convert to floor shift. i can also buy a sbf bellhousing for it, and a good one is $700. only drama i can see is the o/d being too big. any suggestions ?