[Ronnieroadster]

The housing is cast aluminum it can be repaired by a competent tig welded with a little bit of work. In the location of the break thankfully there's no bushings its just an open tube.

The repair is simple first you "V" the edges of the break this gives depth to where the weld is located. You then use a steel shaft the same diameter as the upper and lower bushing diameters placed in the bushings as the alignment fixture.
If a shaft is not available the shaft from the distributer can be used as the alignment fixture. The tig welding is done a little at a time spot welding at three equal locations first so there's minimal alignment distortion. Then gradually the welding continues between the three spots until the entire area is now welded. Once the entire area is welded the bead of thew weld can be removed using a lath or carful hand filing.
Ronnieroadster