My friend wants to bring his '56 back to original. already has a '78 350 in it hooked to a THM350 tranny. The 265 he picked up came with a cast iron Powerglide. The car is a rare 1 of 1 4dr Sport Sedan with factory air, not dealer add on. Original owner was a dealer owner and didn't want dealer add on A/C, so Chevrolet sent car over to Cadillac to have air installed at the factory. A/C vents are in the dash, not under dash. One of a kind.