I pulled off the tank and found a small hole in the vacuum line that goes to the petcock. That had to be my starting problem. I'm still went ahead and yanked the carbs off. The bolt and nut were missing on the #2 carb manifold clamp, #3 and #4 clamps were loose!
I opened up one of the float bowls to see how much crud I'd find, looks good, a lot cleaner than I expected. The main jet is a stock 135, I couldn't find the number on the pilot jet.
I gotta get new bifocals!