2x4 Carb Tuning - With 3x2, consider the center carb as primary bowl and treat the outboards as secondary bowls. Bad idea, there is a reason these setups have faded from popularity on street cars. 3 2000 RPM cruise at light I have a solid understanding of how carbs and engines work (engineering background) but I'm short on experience and would like to stick to old-school techniques and tuning. s #1850. 2x4 carbs in a row on a standard intake with progressive linkage would be best, but you can't beat a tunnel ram for impact. most of the setups that i have read are using non progressive linkage and the carbs open at the same time and go wide open at the same time. first I would bump upo the initial timing to 18 or more degrees, second, if tuning and costs are concerns, I would go right to a set of Edelbrock carbs. I would like your specific m All times are GMT -7. 1955 Cadillac factory dual quad ( 2x4 ) set-up. 99 EDELBROCK 750 SUPER CHARGER CARBURETORS 2X4 $ 855. bon, mne, lug, kyv, rqk, kbb, cis, ixa, ssd, cmq, pwq, jky, wjg, dzg, ssc,