85’ has a 10T Starter and 65T Bendix.
86’ and up used a 11T Starter and 63T Bendix
Mine has the original 65T Bendix. Prior owner must have bought a newer 11T Starter. From my understanding/reading the 11T starter gear is not compatible with the 63T Bendix and will cause the binding/not cranking issues.
Ordered a newer 63T Bendix to test this theory. If no worky will get an 85 starter and use original 65T Bendix. Will update again if it works or not for anyone that may benefit from this.