The 4 bbl. linkage isn't difficult, just annoying. A simple bellcrank on a vertical post converts the linkage motion to fore-and-aft.
My preference would be 2 progressive 2 bbls. (Holley 5200), but depends on your taste.
My argument against "classic" carbs such as Holley 94, Stromberg, etc.:
1. most of them are far beyond their sell date, and even "rebuilt" are not completely fresh
2. price is 10 X their replacement value as a modern 1 bbl. (Rochester M)
3. very few people alive who know how to jet them, and parts not easily available (the only way to jet a 390 wrong is not listen)
A carburetor is no more a fashion statement than a heart transplant: if it doesn't work, there's no point to it at all.
