66 Dart GT wheel quandary

I have a 64 Valiant that had been off the road since 1981. It had "new" 13" tires on it but they were date coded 1980. (185/80R13) The tires still had perfect nubs on them and because the guy I bought the car from never got it running had zero miles on them. They were included by the original owner but never mounted. So the guy who flipped the car to me had them mounted white walls in and they still had the blue stuff on the whitewalls. I thought it looked terrible on the black car so I had them remounted white walls out and used the 13" wheel covers. First Mopar show I went to it won second place out of 20 cars in the survivor class with 1st going to a Challenger. I should mention that all 4 tires were M&S and squealed around corners even at somewhat low speeds. I drove it that way for about a year.

I decided to go to Carlisle (700 miles total) and didn't trust those old tires on the turnpike so I went with a set of 14x5-1/2 Rallye wheels I had in my stash. Using the original 6.50x13 tire as a starting point I calculated the OD and came up with 185/70x14 as a good match. I bought Kumho tires from Tirerack and I'm still running them. They look good on the car and my GPS says the speedo is deadnuts accurate. 60 is 60, 50 is 50, etc. The difference they made over the 13" M & S tires is astounding. By the way, 13" rims are only 4-1/2" wide.

Regarding 14" rims on your car. 14" x 5-1/2" wheels were optional on Darts and Barracudas so you will have no problems. Factory K-H disc brskes require 14" wheels to clear anyway. Believe it or not, it is easier to find Rallye wheels than 14X5-1/2" black wheels these days. You could mount Rallyes and cover them with 14" full wheel covers and no one will be the wiser. Most wheel covers are cheap as not many people want them. You also might check into the optional 14" bolt-thru covers as they look very nice and would be correct.

P.S. If you want to stay with 13" I'll make you a deal on mine.