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Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2008 Posts: 337 Shop Shark | | Shop Shark Joined: Dec 2008 Posts: 337 | I believe the headlamp harness running from the dimmer switch to the radiator support is the same from 60-66. The difference in the headlamp harness going to the bulbs begins after the radiator support. You should be able to just bolt in the other grille, and plug the headlamp harness into the existing bulkhead connector.
The only real difference between the 2 light and 4 light harness is an extra pair of wires running from the high beam filament on the low beam lights to the high beam lights. | | |
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