I just aquired a '56 Olds Holiday 88 coupe (no post). It has the 2-barrel 324, hyrdramatic and an odd option. Rear/trunk mounted A/C unit with two clear plastic tube coming up from the rear package shelf. There is a factory (in the dash) swith that has "RIGHT" and "LEFT" control knobs. I can't find any info on this car. Some people tell me the AC unit was dash mounted in '56 with vents up front under the dash (round chrome) and an added controls switch mounted to the dash hanging down as well. Some people tell me that the rear mounted unit is very rare (usually on Caddies) and odd. See pics attached. Here's the body tag info: Style: 56-3637 Body: BA-4250 Trim: 367 Paint: S31-30 Top ACC Body by Fisher Thanks for any help. I've seen a lot of aftermarket AC units and this system looks factory original...in age/wear and tear, etc. There's a compressor mounted on top of the engine. The dash switches are not aftermarket as the housing is a duplicate of the light switch and they are exactly the same material, font, knob-type, etc. Rich in Texas