I've used this carb on about 6 trips, I bought it brand new in Feb '06 and have receipts for it.. I'm going to a 850cfm on my BBF, so this one is for sale!  It was $330 new, looking to get hopefully $200 obo, make me an offer!  I'll take of pic of it tomorrow..

It is this carb  http://www.holley.com/0-80508S.asp