I ought to know this... I need to time my engine. Of course, the hole in the crankshaft pulley signifies TDC for #1 piston. But how can one tell if the distributor's rotor button should be pointing toward #1 spark plug wire or 180 degrees on the distributor cap from #1 (I know I need to take the BTDC advance into account). Thanks, Paul Dorsey 60 TR3