Don't worry about the position of the cam sprocket. There's an index pin in the front of the camshaft that fits into a hole on the sprocket. The sprocket will only fit one way. Make sure the crankshaft is at TDC and line up the camshaft the way sixto said. Make sure all the chain slack is on the passenger side of the engine, and install the chain tensioner( don't forget to re-set the tensioner ). Turn the engine over BY HAND several times and re-check the cam timing. If you missed by a tooth the marks won't even come close to lining up. Good luck