I agree with what Carrothead said. The fenders would have been different from the 70 Standard, closer to a 70 Industrial, they shouldn't cover the tire, just come up along side of it. Both the airport version, and industrial would have no use for wide fenders as they weren't intended to do muddy work. There is a possibility if you go to Charles City, IA, and visit the Floyd County Museum, they might have the production cards on these tractors, if so, and you pay close attention, do the math, sometimes these cards hold a wealth of knowledge. I have uncovered some amazing things thru the notes I have found on production cards.
Have a great day!!!
Andy