1949 Chev. 2-ton. Got it some time back. Did not run; had been sitting for unknown time in driveway in town. Before I tried anything I pulled rocker cover and found a bent push rod. Top of head pretty well free of gunk and looked oily and decent. I squirted ATF/diesel down all the push rod holes and a little oil in cylinders. Have not tried to turn engine over. I've not dealt with bent push rods before. Two questions:
1: What typically causes bent push rods?
2. How do I begin to deal with this so as to be kind to the engine?