I've not yet had the front cover (timing gear cover) off of my 302 GMC. My timing is 120 degrees out of phase if I wish to use the flywheel timing marks--obviously assembled incorrectly. [#1 firing position, crank and cam, has the flywheel 120 degrees in advance of the TDC circle.] I can surely time the engine, just not using the flywheel markings made by GM. Does the crank have more than one keyway for the timing gear? I thought, but can't find a pic, showing 3 keyways.
