The 160 tooth flywheels and flexplates were very common in the 1965 era 289s. As far as I know, they are the same diameter as the the 157 tooth variety, and both are associated with the "small" aluminum bellhousings of the same vintage. From what I have read on some forums, the parts houses seem to mix up the replacement auto starters with the stick starters, and many people have had problems because of this. Since "search" isn't working yet, maybe some other posters could provide the actual dimensions for the "stick" starter drive mechanism.
66 Fastback Restomod (342 stroker, T5 12.8 @ 112 mph)
85 GT Hatchback