The most resent ones I've pulled apart have had copper contact terminals. With a plated steel contact washer. The copper contact washer from older solenoids will fit in your new solenoids. The steel washers show much more deterioration with little use. The old copper washer look a lot better over many years of service. So for some longevity. I'll get the new units for the fresh contact terminals. And put in the old copper contact washers. It's very simple to do.
Bob Dunahugh
78 GMC Royale
4 original COPO Yenkos
96 Impala SS Linda's
64 Chevelle Convert Linda's
73 GMC
Bob Dunahugh
78 GMC Royale
4 original COPO Yenkos
96 Impala SS Linda's
64 Chevelle Convert Linda's
73 GMC