I have a craftsman lathe circa 1949 that need new bushings. It is a 103 series. This uses 2 1" od x 3/4 id x 1" long bushings and the 3/4" shaft rides in these. I'm wondering how hard it would be to replace them. I think it is probably an interference fit so I would need to heat the cast iron headstock housing to tap them out.
While the shaft is out I would like to have it threaded the same as my later 113 series lathe so the attachments (faceplates, 4 jaw chuck) would interchange.
How best to go about this; or should I just I just scrap the 78 pounds of cast iron?