The reason I bring this up is that it failed emissions today here in Texas. HC level was to high indicating it's running rich.
Whenever I run the lean best idle procedure I run into the situation below in bold:
"If the mixture screw is more than 2-1/2 turns out turns then the Idle jet is too lean (too Small). When the mixture screw is less than 1-1/2 then the Idle jet is too rich (too large). These assumptions are based on the fact that the speed screw setting is not opened more than 1-1/2 turns. If the speed screw has to be opened 2 or more turns then this is also an indication of a lean condition usually requiring greater change. At times it may appear to be showing signs of richness or flooding it is really a lean condition. "
So, the carburetor has always run well, but no matter which idle jets I put in I can never get it to run with the speed screw set at 2 turns or less. I think technically it's running lean but I'm having to compensate by having the plate opened up dumping more gas in. My theory is that this is why I have high hydrocarbons.
Bottom line, the reason I asked if my carburetor was not a "real" Weber is that I'm concerned this carb isn't right and I'm never going to get it zero'd in. Perhaps I should bite the bullet and replace it.