that is about the same setup I have, mine is a 100lb. propane tank on its side and a 20lb. tank for the stove. on the top you should have two holes about 2 inch in diameter. That is how I made mine, then I welded a piece of pipe into each hole so it has stacks for the smoke to go out of. With the stacks there is more air flow and the fire stays going a bit better. nice looking smoker though. Now I am making a new one out of a 275 gal. oil tank, hopefully in about a month or so.