[37SLANTY]

Yup I did. Float level bang on, actually if anything a little lower than it could be but only minorly so. Jets are the factory size of .045. The old jets that came out were .045 also but I put new ones in. The carb is completely rebuilt,.
The strombergs are actually really easy to rebuild and very straight forward in design and set up. Pretty hard to mess them up. I ordered the jet wrench as well so It was done properly. The fact that the carb is just rebuilt is why I suspected the timing or advance mechanisms.
I realize high hydrocarbons obviously point to fuel, but the carb adjusts perfectly at idle and throughout the whole operating range has great power and throttle response. No clouds of black, although exh pipe is sooty. Also HC numbers at higher rpms is great. Only at idle is it high. I should mention I also installed new Stromberg idle screws when I rebuilt it although there was nothing wrong with the old ones.