15" wheel size for 60 Valiant

Well I found 2 15" x 7" Kelsey Hays Cop Car wheels to start with and was thinking about a 205-60-15 tire. I have BFG's 255 T/A's in the back. Looking a a pair of BFG 205's and damn those are expensive, I tought that I accidently clicked on the Pirellis or Continentals. 178.00 each, yikes!!!