Coachmen's website has manuals for download for 1999 rigs that you can use, although those are generic and typically of limited value.
You can also download the manual for your ford chassis off of Ford's site. Your chassis will be a 1998 Ford.
More valuable will typically be the manuals for the range, fridge, furnace, marine toilet and hot water heater. You can find the model numbers on these devices themselves and download them.
I have the V10 in my 2005 Chinook. It is a good engine with one flaw in your model year: the length of the threads for the spark plugs. It is very easy to strip them in the aluminum head and some have had plugs loosen and pop out of the head. I don't recommend changing the plugs on your own - too risky. Even Ford dealers have had some challenges. There are reputable shops that can replace them safely.
Later versions of the heads improved to have a deeper thread bore, but Ford first used a plug that often broke inside the head when attempting to remove.
Oops. I have this later version and intend to have the plugs replaced before a 3,000 mile trip this summer. (My rig has 32k miles).
This problem is there on all Ford modular engines of certain years: the 4.6, 5.4 and 6.8. Pay attention to this one item and otherwise they are good engines.