Status update, got started on the brackets and adapter, welded a 2 ½" piece of ½" steel rod to a piece of scrap plate… Turned them both on the lathe and cut a 2.2" diameter circle out of the plate, which fits up nicely with the tube.

Going to sears in a few to pick up the 30mm socket for the oil pump, need to do some actual work today, probably won’t finish the adapters until the weekend. Made up the two L-brackets for the engine mount, drilled 13/32" holes in the marked places, checked fit, looks OK - need to miter the corner to fit the rounded part of the engine case and make up the 4x30mm spacers out of aluminum…