Stock rod length or 6.200 for 393 stroker?

[CHANMADD]

because the piston is lighter and the rod angle in relation to the bore wall is is less acute the motor will be able to rev higher than the shorter rods. The angle is the same reference as the Rod/Stroke Ratio ..Rod Ratio.If you are going to use a cam that is not making power above 6000 the shorter rod will be OK.... So it all depends on the cam you are going to use.
John

[Mark O'Neal]

The correct rod to crank ratio is 8:1. Eight rods....one crank.

Unless there is an rather severe imbalance between cubic inches and cylinder head size rod ratio is irrelevant.