Originally Posted by bestracing
Not very good, actually, as it is sparse with information, and in this case, the information it has is wrong.
Holley's website has a better reference: http://www.holley.com/data/TechServi...%20Listing.pdf
Looks like a 4160 model vacuum secondary 750.
By the way, mrjhett, "dual feed" and "double pumper" are unrelated aspects of Holley carbs. It's either "dual or single feed", and either "double pumper or vacuum secondary".