For those that care...here are my new tires on my 69 Riviera. 235/75 - I hope it's not too tall of a tire, because I still want to lower the car, now 1", instead of 2". I thought the tire would be a little more beefy, but it will have to do. Don't mind the rust and two toned paint - I have a plan, one step at a time. I plan on driving the car. Exhaust system is next. Thought I'd share for the other 68-69 Riv owners out there!!
