Hi. I couldn’t get my ‘86 Carrera to turn over with the key on Friday. I rolled it off in reverse and it laid this jagged little egg on the driveway.

It’s a piece of transmission bell housing from the bottom on the sensor side. The bolt through the cases is still there. Another loose bolt has pretty much destroyed the starter ring teeth and is hanging out the bottom of the case where it’s blown another hole.
My mechanic thinks this piece can be welded back on.
Since it has one of the main bolts going through it, would I not be better off replacing the front section of the case? Long term reliability is more important than a cheaper repair. Thanks