If I had a clifford water heated intake on a 250. What would be a good carb to match up. It's on a 66 chevy truck daily driver, I live in Canada so it will get very cold. I would like good power not a gas hog. 2 bbl or 4 bbl or 2x2 bbl singles what will work the best. Was thinking of a Holly 390 cfm 4 bbl.