Hutch-
I looked at my carb today and I have exactly the same model as you. Spoke with a guy named Sean at Holley and he said a replacement would be no problem. I'm gonna wait a few weeks to send mine in as I don't want to be without it during that time.
Let me know if you get yours replaced so i know how it went and what kind of turn-around they do on the new unit. Again thanks for the info.
Wish i had of know about this a couple months ago!
-Josh