Same problem
Hey I have the same problem right now... And i hate to be the bearer of bad news, but my piston is the problem with mine. I also thought that the valves were out of adjustment but when I checked them they were out a little bit but not enough to make the racket it was making! I'm boring mine out .50 over this weekend piston is arouund 53$ and rings are 40$ and the rist-pin is around 20$ or so... I'm not sure about the gasket set but all you would need is a jug and valve cover gasket... maybe it is not your case but it is with me... so just a heads up.