metering rods adjust idle turn them in a half or quarter turn at a time only reason i could see it overflowing would be float height to high or sticking open
with a 2k limit you could get alot done. decide on some a arms and contact a builder we got some good site sponsors here that could help ya a ton just start making some phone calls
ya the rubbers are just for noise good thing to take them out they can get invbetween shit and make a mess have ya done a full throttle run all the way to fiftth then shut her down and looked at your plug could be a lil lean