Holley/Demon Carb stumble

Got my 3310 carb yesterday, looks unmolested but haven't had a chance to really look at it or take it apart to remove the metering block.(the reason I bought the carb in the first place)
So i now have two primary metering blocks.
Also got my base plate, so i'm ready!!!.........If i can ever get enough time away from work to play with them.
I hope Saturday night. finger crossed.