I think I may have to put my boots on its getting deep. you say its capable of 12's in the quarter with only 3.23 gears which is unlikely in that car (its heavy) unless there is a ton f fiberglasss in it. and it gets 20 miles to the gallon? I don't know man, I almost don't believe either.You probably get slightly better gas mileage, but make 1/4 the power. I can average 20 if i keep my foot out of it.
My buddy has a 62 vette with a dirt track motor in it. The car has a tad over 400 horsepower and it will run in the high 12's(barely). it only weighs 2700 lbs. It has 4.56 gears And gets no where near 20 mile to the gallon. Like 7 or 8.
My uncle has an old impala that would be closer to your car in weight, motor has just under 400 horse, 300 at the tires (dynoed). It runs very good for a big car, and his best time at the track was a 14.9
Out of your two claims I would say the gas mileage is more believable, but still a little far fetched.
Have you ever taken that car to tha track? you might be surprised.
