I'm thinking you're probably right with the 450 hp. Never been dynoed, I always figured it is what it is. But the formulas I've looked at considering the weight and trap speed put it between 434 and 446 hp, depending which one you use. Not bad for stock stroke, stock bore 340 I figure. As far as the difference between 450 and 600, I always figured that was just the push of a button.lol. tossed that around for years now, the kit is still in the box on a shelf. Change the tune a little bit,and I bet the engine will still live longer then the drive train parts if it hooked. Not sure how to make a street tire hook with a stockish suspension, 4.88 and 4 speed. But it sure is fun on the back roads to dump the clutch at 5k and go through the gears just like my dad did when we put the motor in. THAT my friends is what got me into hot rodding and the memory of that first burnout, in that "stock" dart is still there like it happened yesterday.
