A/C or no A/C

[BIGRAGU]

First of all I have a kind of dumb question. Regarding an A/C cab vs a non A/C cab, with the exception of the obvious extra vents in the dash are there any differences in the cab, particularly in the openings in the firewall? I haven't had a chance to pull the housing off of one of my non A/C pickups to compare yet. I just picked up a nearly rust free cab and it happens to be an A/C cab. I really didn't have any intentions of running A/C. It looks like a huge amount of parts to try to locate and a real puzzle to put togather. I am wondering if I can just bolt the inside and outside housings from my non A/C cab onto the A/C cab? I am putting togather a 1970 Chevy short fleet 4X4. It was originally a C series cab, so 2 wheel drive, so it will be a parts pickup, not all original and #s matching, but that is almost impossible now days anyway. I will eventually get a build thread started if I can figure out how to do it and if anyone has an interest. Thanks in advance for the help. Chris