We have a 1982 Pace Arrow. Gas, 454 4 bbl. 48,000 miles.Gennie has around 175 hours on it We have 2 gas tanks a 70 gal and a 30gal there are 2 doors on the passenger side the front tank is a 30 gal and the rear is the 70 gal.. There should be a switch on the dash for them.
I am not sure how you would put a residential fridge in that little space
Our fridge is a 2 way and its a original , electric (don't work very good) and propane works great.
Just a FYI if there is a emergency start switch, on the dash under the start key,also on a single battery in case you ware down the house batteries, you have to push the button first then turn the key and it should fire right off if the battery is good.I had to use it last year and I am glad the battery was good (A must in my book) especially if you plan on Boondocking.
I really don't think there is much difference between a 82 and a 83 but I could be wrong.