I am cleaning out my Grandfather's shed after 54 years in business (Service Center). Buyer is responsible to do their own research on compatibility. I have only listed what I could find after a quick look online.

You are purchasing a: NEW OEM Distributor Cap 

Part Number on box: CH-405

Cross-Reference Part Number: Rock Auto states GM # 12336838, 4240446, 4883870, 4883870AA, 5206918, 5213034

Ebay determined compatibility per the above vehicle listing. Please do your own research before purchasing.

NAPA determined compatibility as below. Please do your own research before purchasing.

Fits:
ChryslerLaser1984 -1985
ChryslerLebaron1982 -1985
ChryslerNew Yorker1983 -1985
ChryslerDaytona1984 -1985
ChryslerE Class1983 -1984
ChryslerPhantom (Non-US/Canada)1987 -1989
ChryslerValiant (Non-US/Canada)1983 -1983
ChryslerVolare (Non-US/Canada)1984 -1986
DodgeDaytona1984 -1985
DodgeDodge 4001982 -1983
DodgeDodge 6001983 -1985
DodgeLancer1985 -1985
DodgeAries1981 -1985
DodgeOmni1980 -1986
DodgeCharger1983 -1986
DodgeRampage1982 -1984
DodgeCaravan1984 -1985
DodgeMini Ram Van1984 -1985
DodgeDart (Non-US/Canada)1982 -1988
DodgeMagnum (Non-US/Canada)1983 -1988
PlymouthReliant1981 -1985
PlymouthScamp1983 -1983
PlymouthHorizon1980 -1986
PlymouthTC31981 -1982
PlymouthTurismo1983 -1986
PlymouthCaravelle1983 -1985
PlymouthVoyager1984 -1985

Returns are only accepted for dead on arrival items 7-days upon buyer receipt. Refund is only for the price paid for the part. Buyer is responsible for all shipping costs. Part cost will be refunded upon return receipt of dead on arrival part.

Priority Mail is recommended due to Tracking and $100 insurance being standard in the ebay estimated price.