We bought a wrecked 1985 starcraft starlite 21 for cheap, was planning on restoring it but the entire floor, sides & roof is rotton. So we decided that we will try and install the dometic 211 fridge & furnace into our little 91 coleman Roanoke Cd. I tested fridge & furnace they both work great. Question I have is it possible to install this fridge & furnace into the coleman if there has never been either fridge or furnace from factory? Theres enough space under the cupboards for both.