[Johnny Mullet]

You can adjust the ignition timing by turning the distributor. You can do it the hard way with a timing light, or advance it steps until you hear valve clatter (ping) on hills or accel and slowly retard and test drive until the ping goes away. When the ping is gone, this is maximum ignition timing and it will run better.

Advancing would be turning it clockwise when looking at it from the driver's side.