Wellll...

If it was for a numbers matching one of hardly any, E-body convertible or wing car 4 spd type trailer queen, I might consider building it to stone stock specs with whatever used parts I had with new rings and bearings and go. It would likely run a long time just on and off the trailer.

I have no clue if there is a reliable procedure to mitigate the crack damage. I think any procedure would be at best.

If it is just a garden variety VIN or the car is long gone I'd say it's good for a static display.

If you sell with full disclosure etc, I think you would have to be VERY careful who you sold to as the disclosure might not follow it to the next owner.

Kevin