Need a tire size suggestion.

[BR3W CITY]

So the front tires on my 66 are currently 235/60/15, on mickey thomspon 15x8 wheels. That was what the po put on....my question is, what would you recommend switching to? The 235/60/15 is a little wide for the front, although it does fit just fine, I'm not sure if that much width is needed. The other issue is the cost of the tires, while not the most expensive, they seem to be a much less common size tire on 15. Any suggestions?

Fwiw, this is the front tires ONLY, so don't worry about the speedo being off...since this thing has always had different wheels and tires on it, I have no idea if the size is what it "should" be.