I have 2 Rochester bs on my 1954 235. If it was yours would you replace them with Rochester's or switch to other brands and what would that brand be? One of the carbs is original to the truck and the other was an aftermarket purchase.
If it was mine, I would replace the intake manifold with a three-carb manifold (for either side-draft or down-draft carbs).
If it were side-draft, I would use three Carter type YH carbs number 2618s from a Dearborn marine engine (most common of the YH series) and recalibrate for the Chevy.
If it were down-draft, I would use three Carter type W-1 carbs from a 1939 Chevrolet, part number 420s.
In the meantime, I will remain happy with my off-topic shop truck (brand name same as an old country singer from Tennessee) with a 390 and two 625 CFM genuine Carter AFB's running solid linkage that gets 22 MPG at 70 MPH (it doesn't do this well in town with my foot in the rear carburetor
).
And they have been on the truck for 18 years, without being touched!
Jon.
