I'm not going to go into all the pix and descriptions I have about how to install this.  All it took was a little sawzall work and moving 2 wooden cross-braces.  It was really easy.  The hard part was getting the Fridge from my basement into the rig!  BTW - I got this from a '69 D22.
I paid $500 for the whole RV.  The Fridge alone is worth $100 - $200 more.