I used Champion platinum 3071 gapped to .030
Now that I'm double checking the plugs, I may have gotten them wrong though. Still not likely to be my biggest problem.
The engine is CH740-0045. At least that's what the manufacturer's website says. The sticker is completely worn off the engine.
I used:
25-584-15-S coils
25-351-11-S lifters
I'm having quite a bit of trouble figuring out what is worth with this engine. Carb has sat with water and fuel in it and when running the exhaust glows and has a flame coming out of it.
Things I've done so far:
Magneto driven ignition update + plugs
Inspected bottom end timing components...