Learned some stuff ! It took me 67 years to figure out how to get a carb really clean for rebuilding. Pine-Sol soak, then a quick blast with baking soda in a hand held blaster. I'm blown away! Never had anything work this well, not even chem dip.
So, bottom line, bought a book and a good rebuild kit from Cliff Ruggles and rebuilt a spare quad I had laying here. Then dropped it in the truck today. So far so good! Really makes a difference when you actually understand and set the secondary flaps correctly. I am having trouble getting low enough rpm... No leaks detected, but I think I need to switch to a ported vacuum source for the advance to get the idle rpm to stay under 1000 rpm.
You know what else I learned ? Blasting with baking soda outside isn't just harmless powder on my polished aluminum wheels. It actually eats aluminum and I had to go and polish with a 5" wheel, every darn rim to get most of it off. it really dug in there and there are still some spots. Dang !