I'll be reinstalling the cam on my Vortec big block tomorrow and I'm trying to figure out how to "sync" the cam and crank. I know the engine needs to be rotated to #1 tdc but after that, I've reached the limits of my mechanical know-how. Once the engine is at tdc for #1, how do I position the cam and install the cam sprocket in relation to the timing marks on the cam and crank sprockets? Help/guidance is appreciated.