Depends if you have access to a lift or not. Either way dropping, opening and draining the tank was the biggest part of the headache. Drill small hole, insert feed that was provided with heater, run it to the included fuel pump and then good to go after mounting it where you want.
I replaced the side storage pocket with an aluminum box that I put together with the cutouts for the heater.
Pictures are from a while ago, I’ve replaced the pvc elbow with a steel one that a muffler shop put together for me, but i have a hose that I can run anywhere I’d like attached to that elbow.
As for the elevation, I haven’t had any issue with it yet, but I will note that it’s only been out above 9k a couple times. It does have a “high elevation mode” that I didn’t use and got me through a couple 10-20 degree nights great.