Max, the carb on your RN is essentualy the same part as the original version, you just have to buy the needle/spray bar assy for about $18 from tower and screw it in where the nipple is now.

I have two of the .60FP and I think carb works pretty well. I don't know if the perry/conley carb would be better, I have never tried one on this engine.

The .60fp is a bushing engine, so use a fuel with some castor oil in it to extend the life of the bushing.