Thanks for the information. I needed the refresher in tire size, circumference, etc. The more I think about it, the more I believe I'll go with the 14x5 rim with the close to stock dual redline radial sized of 195/70R14's. My Kar is stock except for Pertronix and stealth FM conversion on the original AM radio. I don't drive the car hard, and I think I'd regret not continuing the stock look to the tires/wheels. Happy New Year! KevinAs John said, the 205 is going to be much better suited to at least a 6" wheel. I've tried a 205/70-14 on a 5" wide wheel, and it was VERY "pinched in". Look at it this way: 205mm = (approx.) 8", so technically speaking, a 7"-8" wide wheel would actually be preferable.
In addition, unlike the opinion of many here, I completely agree with John in thinking that the 205/70 is about the tallest tire I'd run on a '65-'66 - though its certainly not out of the question by any means.
I've run 195/75's and 195/70's also (which I much prefer), though they're obviously not as wide, but I've always been more interested in a "stock" look.
195/70-14: 24.7" dia.
195/75 : 25.5"
205/70 : 25.3"