1968 340 timing

Stock timing is 0* for a standard trans or 5* BTDC for an auto trans. Both came with a dual point distributor. Check dwell before setting the timing. The oil pump shaft slot should point at the left front intake manifold bolt when the timing mark is at 0*. [see post #2]. The rotor should point straight forward when the engine is at 0* on the compression stroke. They ran really well from the factory.