[Tom Vaught]

Originally Posted by hgerhardt

Yes, but the 670's were to make the car look more correct.

The 428 is my favorite for street driving: more torque than a 400, but not so much that street tires have no chance off the line. And it still likes to rev.

I'd make a template of the 670 combustion chamber outline and digitize that to mill a dish exactly that shape into the pistons which will maximize quench, which in turn reduces octane dependency.

Not disagreeing with you but always willing to learn, explain how you would "maximize quench". I understand the Mirror Image of the combustion chamber part. Seems like you would need a Gas Ring sealing plan vs a off the shelf cometic type gasket.

Tom V.