Wheres the timing mark?

Damper spun the outer ring, or you’re on the wrong plug wire.

Pull the number one plug, eyeball down the plug hole with a flashlight to get as close to tdc as possible....... see where the line on the damper is.

If it’s not somewhere close to the timing mark on the timing cover, it’s either junk, or the wrong one for your timing cover.

Agreed, definitely check the plug wires first. Small block timing covers changed in '70 I believe, because they changed the radiator outlet positions. Pre '70 timing covers had timing marks on the passenger side, post '70 on the driver's side. I have a 1968 car with a 1978 360, meaning I can't read my timing marks because the lower radiator hose blocks the marks.