I'm trying to find out what size rim and tire to put on my '69 mach 1. It currently has the proper stock on it and I'm wanting to put Magnum 500s, but am uncertain of the size on the rims and tires to have the proper spacing. The suspension on the car is standard. Any help on this would be appreciated. Also, did the mach 1 have a tilt steering column option in 1969? Thanks.