They opened the venturi 2 mm on some carburetors i still use. Work appeared perfect to my naked eye.

That trick, along with some bigger main jets, did more for the top speed of bayou meto boat than just about anything else.

Ole DuckLane’s rig was doin things before it was cool but it got waay too crowded starting 3 or 4 years back and nowadays i wait on white river to flood before i get excited.