SGTFIXIT, welcome to iRV2. You will find a lot of knowledge here. We have a Vintage RV owners group her and a forum fro Vintage RVs.
Get some photos of the rig and post them with some questions. I have never seen a book or manual for fixing up an RV. You can cechk the vendor sites for the various appliances and look for a Chevy chassis manual. Other than that, use lots of imagination....and of course some money.
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot