I've had 'em but they sell fast. Had a Clifford dual carb one a few years ago and an Edelbrock SP2P I wish I would have kept. I scored my Offy C with the 390 Holley for $80 locally.
i am on the hunt--for the van it's gonna have to be an offy square bore c series or the clifford--have found some good deals on the offy's, but distance is the issue--and so many people don't want to bother with shipping--so right now it's all about getting out a twisted off bolt--gotta catch some dog pee--that stuff will eat anything metallic