On the left is the Stock GMC compressor. Note how the AC hoses come off of the top of the compressor. The Compressor is mounted over the top of the intake manifold to the right of center. Hoses coming off of the top like this add to the height of the motor. As is, the compressor barely clears the under side of the hatch. Once you add the radiator hose, we are talking about adding another 4\" of height to the motor. Right AC compressor is from the 73\' Cad 500. Note the hoses snake around the right side of the compressor. So I will move the hoses and AC manifold from the Cad compressor to the GMC compressor.