What condition is the damper? Does the rubber look deteriorated? Is it original, or has it been replaced?
You should make sure the outer ring has moved first, then buy a new one. There are (or should be) "tick" marks that line up so they will show when an outer ring has slipped. So look for those telltales before spending money on something that might be fine.
Another reason to check first is that, if it's still ok, it might still be off. If the damper has ever been replaced, it could have been the wrong one for the engine. Ford has used several different timing pointer locations over the years, so make absolutely sure that yours is for a Bronco, and that your engine is from a Bronco.
Where is your timing pointer? Someone might be able to compare locations with a known-good Bronco engine.
Worth a shot anyway.
And when in doubt, pull the number one spark plug and make sure that the piston is coming up to TDC on the compression stroke (pressure past your finger over the plug hole) and then watch the piston top with a flashlight through the plug hole. When it gets near the top, watch for the marks on the damper to line up with the pointer.
Good luck.
Paul