67 air condition compressor location

[easyrider]

I have a 1967 CST fleetside with a 327 engine and factory a/c. The engine casting numbers say that it is the right engine, but the heads have been changed to ones with the accessory mounting holes type. My problem is that I can't find a photo of the engine on an orginial factory air set up on a 67, so I don't know for sure, but I think my compressor is mounted on the wrong side. It is mounted on the drivers side like on the 72. I think it should be on the passengers side. Anyone have a photo of the factory stock location of the compressor on the 67? I think the a/c was mounted to the side it was on with these heads. I'm confused. Can any one settle what is factory correct for me? Thanks in advance for the help.