Corvette six pack mechanical carb set up on a Chrysler six pack intake...anybody done it?
Edit! Come to think of it, the 1850 bowl (4160) will have the fuel inlet on the passenger side, opposite of the DC mechanical secondary bowls.
The 1850/4160 has a driver's side fuel inlet, otherwise it'd be fairly easy to mimic the factory look. The only transfer-tube carbs that come to mind with a passenger-side inlet are the 4165/4175 spread-bores (Q-Jet replacement, bowl #134-110). Their inlet is on the center of the bowl, but it faces the passenger side to use an existing Rochester fuel line. It's even deeper than a center-hung bowl, though.
One other consideration when using an 1850-style bowl is that not all of them use an adjustable needle & seat. Make sure the one you're getting does! This is a mistake I could see myself making--concentrating so hard on the inlet that I completely miss the fixed needle/seat assembly. The 134-101 (dichromate) and 134-101S (shiny) both appear to have it if you're buying new.
I used an 1/8 (I believe) pipe plug to block off where the transfer tube goes in one of mine. I needed a bowl so i made one work. Wasn’t a big deal at all. I used a primary bowl.
I addressed doing something similar in posts 39 and 44. I'd prefer to find something a little less obvious than a big brass plug hanging out, though. I was thinking along the lines of threading for a socket-head set screw, then epoxying it in place permanently.
Another option--involving more work--would be to use 1850/4160 secondary bowls on all three. In addition to blocking the transfer tube provision, you'd need to modify for an external inlet. The 134-105/105S already uses an adjustable needle/seat per Holley. This option would provide for passenger-side fuel inlets. There's already a lot happening on the driver's side, so getting the fuel lines out of the way wouldn't hurt. I think it would also look better, but that's a subjective thing. The passenger side of the DC setup has a lot of empty space while the opposite side is rather busy.
