As far as I know, the bottoms of the 351Ws have not changed. I have an 85 351W that I put a 94 one piece oil pan gasket on. It is currently leaking. I'm in the process of pulling the pan because I need to also do something about my oil pan bolt hole that is all screwed up. This gasket will work fine right? I think I just didn't get a good seal when I put it on the first time.