440ci problem solved!

The 440's overheating problem was a haircrack in the exhaust valveseat of cylinder #4. I have often seen haircracks on Chrysler bigblock heads but this one goes down to the water passage. heads are unleaded 452 castings. Will switch to 906 castings with 2.14, 1.81 valves. Engine will go into a 72' Charger. No decision yet for cam and setup.