Engine Transmission and Differential

I have an engine, transmission ( I believe 3 speed), and differential.  Number on engine is T0I06YD so I believe it is a 145CI from 1962 ?.  The differential is marked HE2 23 which I believe to be a 3.89 ratio.  Also there is what I believe a 3 speed transmission.  The differential does turn and teeth appear good but I would not trust the bearings.  Engine is tight.  Differential has yokes. I broke one of the generator mounting brackets moving the engine. Forgive me for errors I am NOT Corvair literate.  I just bought a '62 Greenbrier and this is the powertrain I removed;  from what I know the engine is not original due to the oil fill location.  If there is more info need just ask.  I seperated the items just to see what part was locked up.  I did put some transmission fluid in the engine hoping it would do someone a favor when it came time to disassemble.