Ok, lets talk about the dribble. -If you have a dribble at initial tip-in from idle, and nowhere else, its not the end of the world.But if it dribbles every time at tip-in, say from 1/4 throttle or from 3/8 throttle, then thats a problem. -The idle tip-in dribble, may just be too much clearance between the pump cam and the pump arm. -The anywhere tip-in dribble is something else.This is usually a problem in the supply or discharge side. -The supply side is the pump check-valve ( the red flapper). It fails in one of 2 ways: no1;foreign material stuck underneath it preventing it from sealing, or no2;loss of elasticity usually due to fuel contamination or old age. -The discharge side is the passage to the squirter.That passage has 2 gaskets in it.The first is between the bowl and the mainbody. The second is between the mainbody and the squirter. That passage absolutely has to remain full of fuel.That is the job of the 2 gaskets and the 2 check- valves. -There is another gasket between the squirter and the squirter retaining screw. The squirter can store a tiny amount of fuel in it between the check-needle and the very top of the passage before it turns down to the nozzles. If the gasket is missing then airflow past the nozzle could evacuate that fuel.I say could because its not likely, only, possible. -Should maybe add; that as the squirter nozzle size gets bigger, and idle vacuum is still quite high, idle tip-in will sometimes suffer.I imagine it could be due to airflow evacuating the nozzles.I usually just put a faster pump-cam on it or downsize the squirter.
