I have 195/60/14 on my 70 M1. They fit..... had no probs
I know theyre way skinny to the point that they look lost under there but I got a great deal on them 7 yrs ago when $$$ was real tight.
i just ordered new tires this w/e and went 225/60 this time around which is what the car always had since i owned her
1970 Mach 1 San Jose built Dec 23 1969. Marti says 1 of 7. Purchased in 1987. Original family owner of the powertrain 351C 2v FMX.
1993 GT 11,000 miles, Built 2-12-93 Auto, 3:27 Axle, cloth, sunroof. Untouched except for rubber and battery, Purchased new 8-3-93. still has the factory windshield fluid and new car smell.