On my red '53, I put supersonic head and dual YF carbs from an F head. That makes awesome power and have no complaints.
On my '49 3A, Ted, I put dual WOs after rebuilding the engine. I could not get that one to run right. I made new jets and converted the oil bath air cleaner to a paper one. I went back to one and put the oil bath back together. I wanted to use WOs because of how they can be cleaned on the trail.