I also ordered one of those refurbished carbs carbs from Holley on Ebay.
Im glad I checked it out prior to installing it. There was a throttle ball stud stuck in the butterflys. If I installed it with out checking it out, I think my new engine would be in a world of hurt right now. I did eventually get it installed and it seems to run so much better, than the Eddy 600 I had on it prior, to this.
Glad you like the carb and got a good deal on it!!!