I'm mounting a late swing axle box into an oval pan. I would like to make an adaptor plate that allows the late box to fit the rear mount of the early beetle pan. I see some US suppliers (Cip1) offer such a mount that is a bolt-in.
Does anyone have a drawing or info on this type of adaptor so I can make one?

You would be better off buying the later style mount bracket and welding it to the torsion tube... cheaper and less stuffing around.

Best if you have the body off and a bare pan to work with.