In the old stove, the outlet was pretty much centered on the back of the stove, while the Hearth's outlet is oriented very close to the bottom of the unit. This is resulting in about an 8" discrepancy to meet the "T". Pipe configuration, from stove toward chimney = "T" (w/baro) --> 90* elbow --> 24" up. I suppose we'll need to either pour a pad or build a platform. Not sure if one choice holds any advantage over another. Existing hearth is 12" ceramic tile. My husband went to the Depot to pick up another box, and, you guessed it......... not making that color anymore.
Now, the tougher problem. Our clearance from the face of the fireplace to back of stove = 12". The trouble is with the mantle. This stove needs to be elevated so much that the height of it will reach the bottom of the mantle with only ~6" of clearance. I really hate to have to remove it. We were thinking about ripping it and making it flush with the brick face (to get 12" clearance), but it's still combustible material.
Any and all ideas are welcome.Please forgive my confusing description. Here are some pix:

I thought I would get on the Forum before midnight tonight,