Holley identification

Can anybody tell me what Holley this is? I believe it is a 4150/4160, but I'm not sure. Thanks.
Chris
http://i189.photobucket.com/albums/z...or/holley2.jpg
http://i189.photobucket.com/albums/z...or/holley1.jpg

whats the list number on the choke horn?

6160-1

It came off a earily 70s ( 72-73) 440, should be 600 cfm 4160

Thanks a lot!
Chris