Jason, I have used alloy wheels from a Honda Accord with both 195/60 X15 tires and 205/50x15 tires. The rims were 6" wide the 205's required modifcation to the rear wheel wells to prevent rubbing. You can see pictures of the cars with these wheels at
http://www.hononwah.freeweb-hosting.com/home/home.htm the 1969 Roadster has the 205's and the 71 Gt uses the 195's. good luck