Thanks 64fleetside. I was pretty sure this as the case. I can't imagine any dealer attempting to install this style of A/C into a non-air cab. Way too much cutting on the dash and fireall to make it feasible. The reason for my question is because I am rebuilding a 64 that had a cab that was rusty beyond repair. I found a new cab that had factory air and was told it was a 64. There was no ID tag since the roof had been crushed and the top torched off. There seemed to be no way to know for sure.
