Product review (5 stars): Very good match for a 73 Holiday Rambler. Tested and updated!
Very good fit for our 1973 Holiday Rambler Trav'ler. I'll update with pics as it's tested better, but so far looking very good.
 OK so we finally had time to give it a really good run! We're in Texas and it's hitting 100 degrees daily now. I have yet to install the outside damper, but I'm still building on the trailer and will get to that soon enough. We stayed in the trailer to test everything out for a few days and this is a great feature to have. I cooked hamburger steaks, mashed potatoes and gravy for supper, so all 4 burners and the oven got fired up. The range hood had no problems keeping up with getting the heat out of the trailer!
 The light is a small push in 123 incandescent bulb and I put in an LED replacement 123 panel bulb. As the light fixture is  centered in the lens cover, it was a pain and the bulb is offset to one side making bulb changes next to impossible. So bad note to the design of the light itself but easily remedied.