Not Ranked
Made the jig, threaded some brass round stock, drilled .039" hole off center, screwed into port, locked at 12 o'clock with locknut, drilled hole through carburetor bore, done!
Didn't even take carbs off of the engine. stuffed a rag with a small amount of grease on it down the carb bore. drilled the hole and of course most if not all of the chips came away from the internals. Used a special aluminum magnet (Q-tip with grease on it) to gather up the chips. These pieces of alum are so tiny that I think if any did make their way into the combustion chamber they would be vaporized and would cause no damage.
Definitely improved the mid range driveability.
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