I have a 1960 Apache with a big window, which is rusty around the windshield, inside and out. I found 2 replacement cabs in Arizona. One is a small window and real clean for 650. Next is a big window, but with a cut up radio opening, and dents in the roof skin, otherwise clean, for 400. Is it cheaper to fix the dents and dash, or is it cheaper to do a big window conversion on the cleaner cab? It's really important to keep the big window option. Thanks for any suggestions.