I'm building a smoker out of a 450 gallon oil tank. I'm currently in the cutting/cleaning process. Here is my plan. The tank in its current state is 5 feet long, 27" wide, and probably 4' tall. Its profile is essentially an elongated oval, with half-circular tops and bottoms and rectangular middle. The plan is to cut out the rectangular middle, and then hinge together the two semi-circles to form the bulk of the grill. Expanded sheet metal will be used towards the bottom of the grill for the coals (when I'm using it as a grill/small scale smoker) and expanded stainless will be used towards the middle of the grill for the meat. The rectangular portion that was removed will be used to make the firebox, which will be below the grill on the right hand side. It will be plumbed into the grill to allow the smoke to enter. A chimney will be added to the top left of the grill to create a draft for the smoke. Using this design, do you think I'll be getting too much heat by having the firebox below instead of on the side of the barrell? Any other comments/concerns? I will likely use charcoal for just grilling and burn wood in the firebox for smoking. Any guidance would be much appreciated.