Cutting and respling Axles?

The only axles long enough are station wagon, B? or C? and later truck axles. Then you have to make sure the are not tapered. You need 28" to fit original A body housings and less for custom, A body "same track" width. Only have a professional cut and respline them, I've thrown 3 away after a local machine shop did the job for me. Had Moser do a pair and good to go.