iI had Auto Tec, Race Tec, make the last stet of 413 pistons I had made, 4.150 stroke with a 6.86 long hemi rod bored to 4.25 after sonic testing it first.
The block is a 1972 industrial, marine, truck block with the 6 bolt forged steel crank that i used to build a offset 3.91 stroke crank with low deck mains in a 400 block pump gas motor.
I'm going to use the the built 413 block pump gas motor in my 1963 Plymouth Fury and tell everybody that is a truck motor warmed up a little