I currently have a number of SPARK PLUG Adaptors that I manufacture that will suit the old 7/8 '' 18 tpi, spark plug (outside diameter,) and will take a 14 mm modern plug, resulting in better performance and low cost on replacing plugs. these can be sent Australia wide, next day delivery.
Also, have 1929 chev parts (mechanical) for sale, any inquiries should be sent to:-
or phone Val . 03 9744 3645