That looks like a Clifford intake manifold, but every one I've seen has their "6=8" logo on it.
The way the manifolds are currently plumbed there is no provision for carb heat.
I agree that most (all?) 4 barrel carbs would be overkill with this engine, even with the warmed over cam. If you wanted to keep the manifold for looks I'd find a 400cfm Edelbrock or 390cfm Holley 4 barrel and disable the secondaries. Either would fit on this "square" manifold.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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