Just doing some homework before bolting things back together. After installing some JE pistons and cleaning up a whole lot of carbon build up on the valves and cylinder head (the old pistons rings had failed, hence the upgrade) I am getting ready to put everything back together. With the piston at TDC do I just have the timing mark on the cam pulley aligned with the little nub on the rubber cam shroud? Just thinking out loud here (so to speak), do I need to compare the valve position on the other cylinder to make sure that one is closed for compression and the other is open for exhaust? Right now only the vertical piston is being done. The horizontal hasn't been touched since I didn't want to mix up any parts.