Dan hit it; I read the article on CSX 2000 in R&T and saw:
"This is the original Cobra, still with its original 260 V-8, still with its original 4-speed manual transmission, still with its original wire wheels and still wearing U.K.-built Goodyear Motorway Special tires, size 6.40-15 in front, 6.70-15 in back."
I searched the tire and found no pic, but did find this:
