I have a 383 stroker with t-5, and 3.42 gears in my 34 Ford 3 window, Weighs 2150 lbs, gets 17 driving easy, which I did once, just to check the mileage. 300 hp on regular gas, turbo 350 trans, and good mileage seems like a reach. Maybe a 4x4 high torque cam will make it feel like 300?