Ok So I tried adjusting my valves. Failed miserably, so I took another set of rockers from my spare engine and put those in. torqued them down to spec. Put everything back together an go to start it. And it goes THUNK, and then I whiiiiirrrrrrrrringggg.....and that's it. What could have happened? I'd be more than happy to upload a short video so you guys can actually hear what I'm talking about. Thanks in advance.