Ok then what is the recipe for a 425-450 horse streetable 340

Honestly I will be happy with 400 but would love to have a light A body with a small block that puts out 450. No ryme or reason just a number that I have always wanted. To me any more than that on the street is useless. I think that would just be a great car that is a ton of fun to drive. Ive always been a GM guy but admired the Mopars. Ive had a 67 Firebird conv, 69 Z28, 86 TA, and a 2002 TA, the fastest being the stock 2002 Ta at 315 and It was fun but heavy.
With this car at around 4something ponies I think it will be a blast on the street.
Not to mention with those #s I think I can get away without having to upgrade everything else on the car eg. the trans and rear end.