I've got some carb issues. Last year I bought a rebuilt Holley 750 DP (list 9379) from a builder on Ebay (I know....I know) and can't return it, nothing but problems with this guy. I paid him a little extra for what he called a 'stage 2' carb (whatever that means). When I finally put it on my engine (stock 460 BBF), I put fuel to it and gas started pouring out of the vent tubes into the bowls. I pulled the sight plugs and have been trying to adjust the floats, but I've got them cranked so far clockwise that the adjustment (in the fuel bowl) is now below the adjustment nut, but the fuel is still too high. I've got those nitrophyl floats too. Also, I'm guessing I'm gonna have issues with idle mixture screws (I have four of them), how do you adjust those? Thanks in advance for the help.