they claimed thats what I should use.
.030 over 340 with flat top pistons sticking out of the hole .021".
worked J heads with 2.02 intake valves. competition valve job, bowl work, and cleaned up push rod pinch area. gasket matched to a RPM Airgap intake.
727 tranny and 8 3/4 with 3.91 gears.
said it should be streetable and run some high 7 second passes on play nights at the strip with a good converter.