Lots of these setups are out there, but very few of them work as well as an original 1-carb system. Dual carbs are mostly eye candy, unless you're dealing with a highly-modified race-only engine. You'll encounter flat spots, backfires, and generally very twitchy low speed and midrange performance, to get a slight improvement in top-end horsepower. It will take a different camshaft, valve and head work, and probably a modified spark advance curve, plus a matched set of the correct size (small) carbs to make a dual-carb/header system work almost as well as a stock setup. Large dollars and LOTS of hassle!
Jerry
eye candy is right on, and i couldn't agree more!!!! i tried running a offy 2x1 with rochesters, ran like crap, then went to newly refurbished and matched carter w1's ran like garbage. i put the original single rochester and stock intake with duals and it runs better than ever. the only other combo i wanted to try is the clifford intake and a brand new holley 390cfm. only to get away from old carbs which get rebuilt over and over and over.
a stock inline 6 needs exactly the fuel/air that the factory put on it. slapping on duals and more gas isn't going to do anything but give you more headaches. i speak from experience. if you can't live without the multicarb look, buy a 3x1 intake block off the outer carbs and only run the center.
