Terms to look for when researching Chevy inline-6 engines: Log style intake manifold (also used on early Corvette) Siamesed-port head Exhaust scavenging - exhaust diameter Designed for low end torque...on purpose
To some thinking, these design features are handicaps today but we at Stovebolt love our "tractor" engines.
Most of the new 2 barrel carburetors are too big for the stock 292. The smaller base Rochester 2G (283 V8) is a reliable carburetor and may work better (I haven't tested one myself). No guarantees on gas mileage improvement or acceleration bog. Like the Carter YF and Rochester B, they are 60+ years old and may have serious wear issues that need addressing (throttle shaft & throttle linkage etc.).
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
