Also, could have been a no size radial. Most people do not realize that radials were a factory option starting mid-year 67. I got Marti reports on two 67 K code convertibles that I wanted to do a Thoroughbred on. Both had the radial tires on the Marti report. Needless to say I didn't buy either car as the radial tires from 67 just do not exist!
For MCA Concours judging standards, the three accepted options are F70 X 14 Wide-Oval (WSW), FR70 X 14 Wide-Oval Radial (WSW) and
185-R14 Radial (WSW).
I would stick with what 67gt289 said, get the Marti report to determine which tire came with you car.
Regards,
Pete Morgan