Custom Truck Builder David Welch gives us his best Tips & Techniques for installing a custom wiring harness in a Classic Chevrolet or GMC Pickup. If you've got a Classic 4787 Chevy or GMC truck and need wiring, electrical or anything else, we've got you covered.

Product Links:
Classic Update Wiring System
https://www.holley.com/brands/brother...
Crimping Tool
https://www.holley.com/products/elect...

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