I post this out of curiosity and for discussion (or my education). We didn't ask which year 292 so the original stock carburetor would have been the one barrel Rochester B, Carter YF, Monojet or 1-MV. Why did the manufacturer's choose a one-barrel? Cheaper to make? Better low end torque? General consensus in this forum is that the YF is a great carburetor so why doesn't the forum automatically recommend the Carter YF 4371S (for California) 1965-67? Jon said the Carter YF was tested and designed for A/F ratio delivery (I would assume to meet Chevy's/GMC's engine requirement) and not CFM.
"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."
