I have ran a clifford 4bbl intake with a 390 holly on a 270 gmc. It did quite well, and woke that 270 up a bit. I do believe the primaries are too big, and the secondaries are too small on that carb. There is no comparison between the 4bbl and the 5 stromberg 97s on my 302 gmc. I have had many vehicles with multi carbs. I have had straight linkages and progressive linkages. Let me say there is nothing like running a multicarb setup with a progressive linkage. When those secondaries open up, the engine howels and the smile can not be knocked off the face with a 2X4.
My advice run a 3X1 intake progressively. And remember ... "The person who says it can't be done should never interupt the person who is doing it!"
