I would like to start by saying this website has been the most helpful website I have EVER encountered. I am a long time lurker but reaching out for some help on this one. I purchased a SBC tunnel ram from an old timer with two of these carbs and they were advertised as 660 center squirters. I knew by looking at the provided pictures that they were NOT the 660's that I have come to know from research but the price was so good ( and 660's so pricey) that I grabbed the setup and figured I would sell the tunnel ram as I am not building a SBC and run them on my RB Mopar tunnel ram. I am currently thinking it's an old 750 DP with some mods but would like to know as much as possible as I plan to rebuild them and need to know what kits to buy. Thanks to everyone in advance for any help you can provide.