This 1976-1981 ACDelco Corvette Fuel Filter, GF47, mounts where fuel line enters carb. It is a paper type element about 1-1/2" long and is used in the later Rochester Quadrajet Carburetor equipped Corvettes.
Learn more from the following Mid America Motorworks Knowledge Library article:
Corvette How to Determine the Signs of a Bad Fuel Filter
ACDelco