Mason engine ??

[Buzz68]

Ok friiend of moine talked me into keeping this engine.

So here in goi g have questions

Ok what size ball bearing doese the rids and main carriers take look like .45???

Mine are pretty crummy so im guessing .5 ball ????

Also need help in how crank comes appart is the center shaft 2 piecs or is the key cut quartered

And my spare crank not the best but useable  but will it press out??

And tge chain grears are different counts 1 is 10 tooth 1 is 14 tooth??