Have you "static timed" the spark? Get the timing mark lined up under the tab at about 10 degrees before top dead center (crankshaft stopped, obviously) and turn the distributor housing clockwise until the points close. Back up CCW until they just barely open. Lock the distributor down. The timing should be close enough to start there.

Another way is to use an ice pick voltage test light. Ground the wire, and touch the pick to the terminal at the side of the distributor with the ignition switch on and the points closed. The light will not burn. Turn the housing CCW until the light just comes on, indicating the points have barely opened. Button everything up and crank it up!

When the #6 exhaust valve closes, the distributor rotor should be pointing to the #1 plug wire.
Jerry


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