1965 barracuda trunk lock

Wondering of anyone knows what kind of trunk lock cylinder I should be looking at for a 65 barracuda? All I find is 60-100 cylinders online, the 66+ cylinders are more reasonably priced but what are the differences? The car was missing the lock when I got it, the hole looks like the cylinder should be a threaded back bit every one I see online looks like that isn't true.