Caps (Gas/Radiator/Oil, Etc.)
From Eaglepedia
Note Unless otherwised indicated all Part Numbers are from Advance Auto Parts. Your favorite Parts Store should be able to cross refernce them to the brands they carry.
Gas Tank Cap
1980 - 1988 All: Standard, non locking: Stant 11806
1980 - 1988 All: Locking: Stant 11583
Oil Filler Cap
1980 - 1988 All with any Original Equipment cover: Stant 11085
1981 - 1987 4.2 Engine Cars with aftermarket replacement covers. Measure hole diameter and inquire at your local parts store.
Radiator Cap
1980 - 1988 All: 13 lb. Standard Cap: Stant 11229
1980 - 1988 All: 13 lb. Lev-R Vent Cap: Stant 11329