Stroke old 340 or new crate engine

Abodybomber said
This...You don't need a supercharger to make 500 horsepower... Here is a better question(s): What is your plans for drivability, pump gas (?), and is really 500 horsepower, a goal?

It's a prostreet duster with 21.5x33 mt's. It has manual brakes and steering no heat or wipers. Im not overly concerned about daily drivability as we mainly cruise it to shows. This may sound lame but it needs to look and sound the part. It sounds the part now but performance is poor.