Dutra Duals

its gonna pull what it can. 1 2 or 4bbls. Stock cam with a 4bbl is probably not gonna be any better than a 2 bbl, and 2bbl intake set ups seem to be highly regarded these days....$$$. Weber 32/36 DGEV (electric choke) , or a Holley 350 2bbl or BBD would be plenty. My choice woukd be in that order. ^^ Edel 500 ^^ is a good option as it has a weighted air door for the secondaries so it wont 'overcarb' like a DP. Id be curious to see how much of the secondaries open on a edel 500 on a stock slant.

the Holley 350 seems like it would be a logical choice, but for some reason folks have had issues getting that carb to run right on a slant, the two bbl Holley 500 is reported to a better choice.
info in the thread linked
Holley 350 CFM 07448 - Carburettor - WOT issue - Slant Six Forum