Time for new tires on my 74 small block. Currently running BF Goodrich TA Radials, P255/60R1510S M+S on front and back.
Weekend summer driver, hardly ever in rain. What are others running on their C3's?

 

That size fits good on those years, same size I use on my 77 with Grand Am's no issues. My old 70 that I had always ran the B F Goodrich that size maybe a little wider, the wider tires tend to follow the grooves in the roadway and rub the frame on tight turns. These day's it just depends on how much you want to spend.