I recall, from 1965, riding down the 101 between Belmont and Redwood City in the SF Bay area, counting Mustang passing by in the opposing lanes. I'd routinely count 50-75 of them. Shortly thereafter we bought a Ivy Green 66 C code coupe for my mom. She drove that until it was passed onto me in 1972. I drove it daily across the San Mateo Bridge to attend Cal State Hayward. I still own that Mustang, and have bought 3 others new, and 3 65-66s over the next 45 years.