I just completed installing a new wiring harness (for 1950 chevy 1 ton)from Classic Parts and had real good experience. The wiring kit was $150 but needed to add additional cost for turn signals (dual element front running lights and new turn signal switch on steering column)

easy to install and all wiring labeled good, good instructions. I would use the Classic Parts again and would recommend to others.

Old Truck addict
1950 chevy 1 ton napco
1956 gmc 1 ton dually napco
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1957 gmc civil defense napco panel