1970 Mach 1 Steering Wheel Size

[dbdragracing]

I need a steering wheel for my 1970 Mach 1. Ive already given up on the rim blow idea...can't afford one. I looked at the Grant Mustang steering wheels and love them. What size wheel came stock in my Mustang...15"? Thanks.

 

[Grabber70Mach]

My stock rim blow measures 15 1/2" outside to outside.