Hey marty
just found this post. I have one of these games in storage as well as the Speed Race Twin & Speed Race delux CL5 upright. I've got the set!!!
The steering wheel on this game is very similar to that of a early model Holden. Mate you're doing an excellent job on the restore, if there's anything I can help with just ask. Keep up the great work!! 
Thanks mate. They are classic machines and certainly popular amongst the car lovers! I have not decided what I am going to do with the steering wheel as yet. A mate has a HG monaro with a very nice steering wheel which suits the game perfectly. However one of those is worth more than the machine itself so wont happen.
