I am looking at making an OAK for my USSC 6500. I have been looking online and couldn’t find a kit pre-made for it. Before I start, I wanted to make sure I am understanding the air flow path since it does not have a combustion air intake in the back that I can see. I believe the air intake is through the vent/opening on the front of the ash pan. Pulls air through there, then up through the dampener, through the burn pot and heat exchanger, then back down the cavity behind the burn chamber and out through the exhaust.
Here are pics of the front vent I am talking about and also the back of the stove (in case I am missing the combustion air intake)