Probably not. The design changed sometime during 51. See Master Parts List sections 7.778, 7.779, 7.780, 7.782 and 7.783. Visually, the new design has a diagonal strap or bar as compared to previous designs.
"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."
