I know the engine to bel-housing bolt pattern changed in 63.
I am pretty sure these will fit all the way to 62.
I have been told that they are nearly indestructable trannys.these two are both good units with linkage to boot!!!

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
-
-
Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!