I've seen several of my RV friends use these engine stands when doing final assembly of fuselage components.

I bought the stand from Harbor Freight. The current price is right at $40. Here is a link to the item.

I simply cut a piece of 3/4" particle board to fit the engine mount for my O-200.

I attached the mount from the engine stand to the particle board.

The tail needs to be raised so that the fuselage turtle deck area doesn't scrape the ground. I used my drill press stand, but anything will do. If you're in the market for a stand, Harbor Freight sells these, too. Here's the link.

I'm using the "rotate" feature to make stripping the bottom of the fuselage a little less painful. As you can see, I'm using a stool to support the tailwheel. The whole thing is surprisingly sturdy. I started off babying the setup, but then realized how sturdy it is.

The fuselage also rolled around just fine with nothing lifting the tailwheel so long as I didn't need to rotate it beyond about 45 degrees. I left it in this configuration to install all the interior components and electrical system. It was nice because the longerons ended up being about waist-high. Perfect for bending over into the fuselage... well, about as good as you could hope for. I still had a pretty sore back after all that bending over for a month's worth of electrical system installation!

Here's a close-up of the particle board piece I fabricated along with the steel mounting plate removed from the engine stand.