The 465 hp 502's I bought are in worse shape than I bought them as, The engines arrived and we dynoed them and did a leak down test, both engines had problems on the leak down so I told my engine builder to tear them down and find out what the problem was. Yesterdeay he called and told me both # 7 cylinders in both engines were water intruded and were so bad out of shape he will have to bore the engines and install new 30 over pistons in both engines or they would't last till the water got hot. So now instead of just installing engines, I am looking at two complete rebuilds.