I don't know how it'll run (my 1st intake) nobody has done this before that I know of. The carb has a little more cfm than the stock carbs all together. The stock intake is about 3 in. I was trying not to favor any cylinders. If the carb was closer it would favor the no 2 & 3 cylinders. there is a primary & secondary circut, should have good low end. The thunder series eldebrock has an adjustable secondary circut. My eng is low on compression now (happened in the Mint 400). Wanted to compare before I tear down the eng.