I believe that you can get the engine to run with just about any carb/manifold combo, however I feel that the stock manifold does not flow well enough to take advantage of a 4-bbl, even a small Holly 390cfm. Plus, after you hassle with fabbing up a new linkage you might as well upgrade the intake manifold at the same time. A Carter/webber 2-bbl would probably work better if you want to keep the stock manifold.
