I'm posting my 1974 OPC needs list in case anyone wants to trade/sell.
Series 1 whiteback - Gadzooka, Hostage, MinuteLice, MrsKlean, Mutts, 6UP.
tanback - Breadcrust, Coverghoul, Crust, Dopey, Horrid, Hostage, Tied.
1 Puzzle Light back #2, 5, 8. Dark Puzzle #3, 7, 8, 9.
Series 2 Ditchmasters, Sailem.
Puzzle pieces #5
Series 3 Argh, Hawaiian Punks, Hurtz, Koduck, 1-A, No Tips, Rabidshave, RawLeaves.
Dark Puzzle #1, 2, 4, 8, 9. Light Puzzle# 2, 6, 8, 9.
Series 4 Armor, Bald, Brute88, Dampers, Hipton, Hydesrox, LandOLakes.
Puzzle piece #1, 3, 6, 9.
Thank you in advance if anyone can help!