416 Longblock built-need help deciding on camshaft-SR or Ft?

RAMM said
I will measure the width of that ledge and let you know just how much area it covers but experience tells me it still provides a significant amount of charge motion.

The step pistons you are referring to in your 493 sound like an Icon piston which is basically 2/3rds of a piston with a much lower compression height and they don't offer much quench at all. J.Rob

Not going with the Icon piston you are referring to, as I am after maximum quench. Was thinking of a custom piston that's "0" decked over 2/3'rds of the piston with a small rim that's "0" decked around the remainder of the piston similar to what you have with a +-23cc dish under the combustion chamber.

Using a solid roller.