Transmission Problems

Our friend John picked up this stock 74 Ironhead and has had a few issues with it, well he dicked around and took it to a few other shops in town, and boy did they genuinely fuck his bike up. So he brought it to us to un fuck his bike. Dave-o tore into it while I was gone and found a disaster inside of a newly rebuilt transmission supposedly.
She's gutted

Broken gears that lead to damage in the transmission case.

Can't see it well, but the case has chunks missing and some bad cracks that need welding up.

There were a few teeth missing from this gear set.

The bike is very nice, it's just a shame it has to be completely taken apart to fix, or the transmission could be cut off and adapted to a big twin transmission.