How do you site timing marks for 69 Pontiac lemans?

To set the timing marks on a 1969 Pontiac LeMans, first ensure the engine is at top dead center (TDC) on the compression stroke for the number one cylinder. Locate the timing tab on the timing cover and the harmonic balancer; the timing marks are usually indicated on the balancer. Align the mark on the harmonic balancer with the desired timing specification indicated on the timing tab. Adjust the distributor as necessary to achieve the correct timing setting.