clintv8

I didn't port these cylinders, I believe it's a white knuckle dune port exhaust has been widened and raised transfers are raised intake ported.

I would like to do it my self. I have ported cylinders before.

I have a banshee I am putting together it has dune ported cylinders for a stock stroke. It needs a new crank I was thinking of doing a 4mil what do I need to do to correct the port timing for a 4mil.