Here is what a fellow HAMBer had to say:
'That's a stock intake with a couple of carb risers welded to it. Gotha and Almquist used to sell universal carb risers for both two bolt one barrels and 94/97 type three bolt two barrels. Another trick was to sacrifice a coupe 97s for their bases, turn the bases upside down, and weld them to a stock cast iron intake. Then you could attatch the carbs to the intake with 5/16 bolts and nuts. Of course, back when this was popular, a used 97 went for 50 cents to a buck!'
Darn, that makes it even more interesting...
It looks soooooooooo clean?