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Click on image for the lowdown. 
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7 members (66flea, Gray_Ghost, Charles in CA, Wally / Montana, dt235sd, Christian, 1 invisible),
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Mod | | | Forums66 Topics128,050 Posts1,055,757 Members48,426 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: May 2007 Posts: 292 Wrench Fetcher | | Wrench Fetcher Joined: May 2007 Posts: 292 | They got conversion kit's for the round head light's it convert's the glass bulb into a late cool plastic so you can run cool blue head's and super bright light's. . . i'm NOT! going to the square bulb these are stil round i just need to knoe the diamiter of the 4 light system of the 60-66 GMC's. . .5" 5-1/2" 5-3/4". . . .  Mike !
1962 GMC K3000, GMC-379 V6.
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