Gearing ?

dukeboy_318 said
according to Allpar, a 1965 Barracuda with a 273 (318 is gonna be pretty much the same weight), 3199 pounds. At that weight, to get to 105-110 mph, you're gonna need to crank that 318 up quite a bit or add some spray or boost to it. Doing the math using the formula HP=Weight * (MPH/234) ^ 3, you'll need 330 hp at the tires to pull that trap speed down. That's a pretty warm 318. Not impossible by any means, but a stocker or mild 318 ain't gonna pull it down.

OK so say I make peak power at 5500 so about 325 to 350 hp and add 50 - 75 hp shot of Nos for a 400 hp engine. So say now I got to shift and cross around 6000 rpm so replace everywhere I said 2.94 gears with 2.76 gears. So end result would be like a powerglide with 4.25 gears.