1968 340 timing

67Dart273 said
^^X2^^

I'm not familiar with those marks someone added them? OEM timing mark should be one big deep slot clear across the balancer

Timing light should be on front driver side

Timing marks/ balancer/ tab is different from earlier (pass) to later (driver) side timing tabs. you cannot mix those balancers

Lacking anything else, take a vacuum gauge on manifold vacuum and time it for highest idle speed, then hook up light and "work backwards"

Not sure on the balancer. Purchased the car with this set up. I do understand that timing tabs did switch
over from pass to driver (1969/70 maybe). The way my water pump/power steering are located driver side. No way a timing tab would work on the driver side.