OK, I know I posted something similar in another thread, but it's kinda buried, and was an unrelated thread anyhow, so I'm gonna ask in a new post. I tore down my engine per the instructions posted in another thread (I think popper posted it), but I had noticed that the Exhaust manifold didn't mate up with the block, it's opening was actually wide open under the block. I sealed up everything like that linked website said, and really gooped up that opening...It has no power ever since. 2 things I did, I bought some gasket material to make a new gasket for it (since I didn't put a gasket on it), and I bought the copper stuff to do it again since I had used the traditional form-a-gasket the first time. But, what my question is, How do you know to put in the sleeve for the piston? I lined it up centered on the openings the last time, but I've questioned it ever since I did it. Does it have to be lined up a certain way kinda like timing it? Maybe part of my problem was I got some goop somewhere I shouldn't have, who knows. I'm gonna try it again like I said with the copper sealant, a new exhaust gasket, and I bought the 2 needle carb while I was at it since all the advice seems directed at them, and I hear they perform better. Any other advice before I tear it down again guys???