Interesting 1965 Formula S Info.

I stand corrected on the 275/273. The K code Mustang was a pretty good runner. back in the day, I almost bought a 65 Comet Caliente that someone put an "A" code 271 hp 289 (K in a Mustang) into but retained the automatic. It was pretty rough so I passed, I think the seats were not even bolted down.