What if, around 1930 or so, Curtiss had taken the bore, stroke, and cylinder spacing of the V1570 Conqueror and applied more modern engine technology (including gearboxes, variable-pitch propellers, and superchargers) and materials? They should have been able to get 1000 hp. easy and likely more, certainly enough to be reasonably competitive with the V1650 Merlin and Allison's V1710. I could see this making for some interesting aircraft variants.