A T56 Magnum will handle that kind of power and tourque (750,750). There's a couple differant gearing options on them and it does depend on the rear tire heighth. I got the one with a 2:66 first gear I think my rear tire is 28 inches or so in total ( 19 inch rim + tire) I have read that a 4:10 rear should hit the right rpm's in sixth gear. I"ve yet to complete the car so I can only relay info I have read on this site and others.
With that kind of power I would think the tires will still roast in the lower gears. lol.
Try a search it should pull up lots of info.
