John,

Since you have the head off- look at the timing mark. Just make sure the piston is at the top of the cylinder... Set the camshaft at it's marking.

If you want to get the exact tdc point with head off- bolt down something accross #1 cylinder with a bolt or something preventing 360 degree rotation. Put the degree wheel on the crank, and a pointer on the block. Go one way, then the other. Half way inbetween is perfect tdc.

Follow the manual.

M