I'm pretty sure the Mk1 Zephyr was the one owned by Ivan Cranch. It had a Jaguar motor set back in it so Ivan had to sit squashed to the side and changed gear almost behind himself. Peter and Ivan lived close by each other and I think Peter may have done some work for Ivan.
I'm not 100% sure where the Rod Coppins photo was taken but at a guess it could be Matamata.