I run an aftermarket T56 six speed in my 455 engined Formula. Not quite going to meet your $1500 budget, but if you want a road racer, this transmission is great (double overdrive with good first gear ratio). Factory rated max torque is 450 lbs ft. My engine is making over that, but I don't drag race the car (anymore). The engine has so much torque that I can stick it in 6th at 1000rpm (about 30mph) and pull away with no fuss.
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