Slant Six 4bbl: Offenhauser 5270 and Holley 8007 390 CFM
I have a 4bbl intake and carb that I was going to use on my slant six before it turned into a 318 Magnum. Parts are located in Albuquerque, and I will ship.
Offenhauser 5270: Very nice 1997 casting, all threads look great. Freshly sandblasted and ready for color of your choice. Comes with square bore 4bbl adapter, but needs flat head screws to attach to manifold. Stock used a flatblade screw head you can source at the local hardware store. I recommend using a hex or torx head like pictured from McMaster Carr below. $300 plus ride.
Holley 8007 390 CFM carb. Excellent shape, all linkage moves freely, appears hardly used. $250 plus ride.