two push rods gone? which means they likely broke and have fallen into the block. one way or another, a complete disassembly is in order, to hopefully determine what/if something else caused the rods to go. i recently came across a 261 in a salvage yard that had an almost identical problem, and i'd noticed that someone had removed the oil filter and had a hose passing from one port to the other, but the hose was kinked/limited oil flow. ?
