Scouting for used Holleys I ran on a Model 4150 double pump 750 with annular boosters in all four holes. It looks like someone took off the center hung fuel bowls and substituted two side hung front bowls, and the choke horn has been milled off. The size is based on a visual of the throttle plate. What could it be? I know it's a Frankencarb but it's a lot of work to swap boosters so I think they're original. I think the main body might be interesting. We have a couple of carb experts here, any guesses?

Thanks, R.