My transmission died from antifreeze poisoning and I have the engine/transmission out for the tranny replacement. I am replacing the front and rear seals of course but, I was thinking......... The main and rod bearings are right there, why not replace them now.
It was running fine before, Since it's not broke should I leave it alone? I would use std size bearings and not turn the crank. What would yooz guys do?

 

I'd leave it alone... Replacing just bearings at this point will unbalance things.