[Streetwize]

Depends mainly onthe driver, the torque/powerband/gearing you have and how tractible you want the power to roll-on.

600hp generates more Heat than 500hp, to me the best way to build a 600hp motor is to have roughly the same high torque easy revving powerband as a typical 427" 500hp motor with the exception of having an additional 700-1000 rpm up at the very top to where that additional 100hp is there when you need it. With the right heads compression and cam this isn't too hard to do.

I'm also a firm believer in having 2 carbs and tires...a double pumper and race tires for the track and street tires and either a vacuum/Air Valve secondary for the street. Double pumpers (when tweaked for max acceleration) are tough to modulate on the street, especially in a lightweight high powered car and depend on optimum bite....going around a tight corner at speed that looked 'dry'. With a DP it can catch even the most expereinced drivers by suprise when they can't reaquire traction due to lack of tire contact.