I have some sets of paper parts catalogs I'm giving up:

Corvair

Cadillac thru 1975

Pontiac 76-81 w/illustration book

Chev 76-81

Pontiac 82-88 Fbody

Buick thru 75 Illustration

Olds thru 75 Illustration

Pontiac thru 75 Illustration

Standard Parts 1987 (lists nuts/bolts/fasteners, etc per GM part number)

Buick 76-81

chev 76-81 Illustration except groups 0-3 (engine/fuel/front electrical)

Let me know if you're interested. Sorry, no Chevy ones just yet.