Did any of you horsepower calculator guys ever use this

Yup, guilty as charged! Everyone that sees my car and asks gets told it's "just a 440, not much hotter than stock. I just put loud mufflers on it"
:lol:
Yep. When people ask how big is your motor, i tell em its a hundred over 396. I dont tell em i'm talking cubes, not overbore. Not my fault if they assume its 415. (Its 496).
My 520 is gonna be a stock 413. I dont think very many will believe that though.