bad news...I believe i found the actual source of the problem.The oil pump that is driven by the cam (above the bell housing) "seized" and sheared off the keyway between it and the cam.That is what likely caused the timing to screw up and in turn allowed the exhaust valves on the opposite head to hit the pistons..(all 4 on the one head were making contact with pistons but it appears 3 are ok but may be bent.)I am now looking for a new oil pump and key.Is this oil pump strictly for cooling the oil? cause i looked at the oil pressure and it was normal befor i shut er down.