I've got a new (never used, installed or filled) 870CFM Street Avenger Holley 4V carb in the original box. Manual, base gasket, installation parts kit included.
This is a 4150 style carb, with center pivot floats and electric choke. Compatible with Ford A/T kickdown.
Summit list price is $395, $299 plus shipping owns it. Please PM if interested, but hurry, it's also on eBay now with a Buy-Now at this price.