............MEGA block.........

I have a set of flat top Ross pistons that measure 4.522 for a .030 overbore. They have valve reliefs for the biggest valves that can be put in a B1 head, gas ports, .041 / .041 / thin oil with lots of room to the top ring from the crown and a good distance between the oil ring and the pin. Skirts coated. Came out of my 499. Might be good for that block.

And good luck with the aorta operation OMM.