Why'd ya take it out, I'm not shure but it may be a rare option for '63 if it was factory installed or dealer installed in the car, might want to check that out b4 you sell it, could add a lot of value to the car if it's factory original, if it's dealer installed, it's not rare. when selling, that box is just a fraction of the a/c parts, theres the compressor, evaporator and a few other things under the hood that actully do the cooling.