Can someone help me get an idea of what may be the reason behind a bent pushrod in a 76 caddy 500 motor. It is basically a stock motor with unknown miles. The oil pressure is fine. The motor sat for a long time, but ran well when I resurrected it. The only modification is a new timing chain set 4* advance if I remember correctly. I resealed the motor fully expect head gaskets when resurrected it for my project. The motor seemed in good shape from what I could see.