I mounted the 84 in the Corsair directly off the firewall, and contrary to what everyone says, it will fit inside the cowl. I DID grind down the fins on the valve cover just to get a tad bit more clearance, but it wasn't absolutely necessary. I did not use the Keleo exhaust, but the flex pipes that come with the engine. You can bend them and they are long enough to fit out through the exhaust pipes in the stock location. With the motor mounted this way, just the normal warbird amount of rudder was needed for take-off.