This post indirectly points out one of the major problems with online websites.
A part is listed that is a given size. A customer measures his part and determines the size is different.
Is the customer's part bad??
Who knows!
The ONLY way to know for certain is to pull the bill-of-material for the carburetor in question BY TAG OR OTHER IDENTIFICATION NUMBER, determine the original part number for the part in question, and then measure a new old stock part.
A little carburetor design information (this is above carburetion 101):
The power valve assemblies are TIMED to come in at a specific point (generally vacuum related). Different length power valve actuating values, and also different length activation plungers on power valves are used to have the power valve open when the engineers want it to open.
Example: all other things being equal (same vehicle, same engine) the power valve for an automatic transmissioned vehicle will normally be set to open SOONER than a valve for a manual transmissioned vehicle; as the load created by the losses in the fluid coupling are greater than the load of direct mesh gears. Thus more fuel is required earlier.
Thus, without being able to positively identify the carb (and most B's are missing the tag), it is impossible to answer Cavebull's original question.
If we were going to list individual carburetor parts on our site; rather than size, we would list the individual ORIGINAL part number so the customer could verify he/whe was getting the correct part (and maybe Mike's did list the number, I have not checked their website).
At this point in time, IN THE ABSENSE OF OTHER INFORMATION, I would suggest Cavebull try what he has, rather than ordering a part that may be incorrect for his application..
Jon.
