Here we're back to the big 180 HP Franklin, with views: above of the cylinder head baffles, below of the duct from the hot air muff going through the upper pylon to the carb heat box in front,

and a rerouted air induction pipe above the prop shaft. Note (on the far right) the oil cooler above the governor. This is totally different from the 4R, as I learned later when I switched engines.