Does anyone know what's involved in coverting a none a/c cab into an a/c cab? I have a '72 Cheyenne with a/c. The roof along the drip rail has holes big enough to climb out of.:eek: I have come across a few a/c cabs pretty cheap, considering how much work & time it would take to fix my cab. Any help would be appreciated.

Heres the firewall diff. plus the dash vents, which are easy to cut.