I'm planning on taking my truck to a mechanic friend who has lots of experience with multi-carbs to do the tuning, and he has the tools to do it right- an exhuast gas analyzer- That is the only good way to get the mixture right as I understand it. I'm just guess, but I think he'll use 02 sensors in the ports on the Fentons to measure the front and rear exhaust gas and then adjust the carbs accordingly. There are kits in speedway and other vendors to measure exhuast gas that work that way.

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi