Meter rod gauge for 1938 Chevrolet Carter W1 391S.

My Hygrade manual says gauge CT109-2 (2.795 inches)

I don't have 1938-40 Chevrolet in my Carter book but it lists 1941-51 Chevrolet W1 as gauge T109-25 (2.795 inches)

Last edited by buoymaker; 01/06/2021 1:50 AM.
"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."