Remove the spark plug on #1. Place a finger over the hole. Rotate the engine. As the piston rises on the compression stroke, you'll feel the pressure increasing. At some point, the pressure starts to decline. Back up a tad and that will be TDC, or close enough for what needs to be done.
Rotate the motor through a few cycles so that you can feel the difference between intake, exhaust, compression, and power strokes. It is at the top of the compression stroke that TDC is found. About 5% degrees before this point is where the points should fire, or BTDC.
It is irrelevant which tower becomes #1, as long as this tower is where the rotor is pointing at #1 TDC.
DJ
FL
