Re: 1969 GMC headlight conversion and wiring questions.
Cibie H4 & H1 headlamps • 5.75” round for the low and hi. These have a H4 for the low and H1 for the hi beam. Note with this light upgrade I recommend the head lamp relay wire upgrade is installed in the truck. link http://www.madelectrical.com/catalog/rly-1.shtml
here is a link http://www.danielsternlighting.com/p.../products.html
Or the seal beams from http://www.sylvania.com/en-us/applic...n.aspx#fldYear
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Trueman
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