I think it would be well supported but only if it was done outside of MA.
I have a Pre65 AJS Metisse that I have been restoring for a while and even if I ever finish it is unlikely to ever see the track at an MA meeting. Main issues, doesn't have folding footrests, no provisions for the ridiculous rear sprocket cover, no provision on mag for kill switch and other things that I haven't thought off.
So without butchering the bike it would never get through scrut so why would I even bother.