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#1
10-21-2020, 12:14 PM
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Valve Cover Bolts
After doing some research, it would seem that valve cover bolts used from '64-'68 were black (phosphate, zinc or cadmium?) where as '69+ were silver zinc or cadmium.
Going through my fastener stash from various projects & parts cars over the years, I've come up with a few variations. Would be curious to see pix of original restored or survivor assembly line bolts. 
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John '68 Firebird Ram Air 4-spd Conv. John 14:6 Semper Fi 
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#2
10-21-2020, 02:05 PM
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Here’s a pic of mine off my 67 gto
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#3
10-22-2020, 05:23 PM
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My ‘65 has 8 letter “D” flange head bolts.
My ‘66 has 6 letter “E” and 2 letter “L” bolts. Maybe whatever was in the bolt bin on the assembly line that day. Chris.
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1) 65 GTO Survivor. 43,440 Original Miles. “Factory” Mayfair Maize Paint with Black Pinstripe, Black Cordova Top, Black Interior, OEM Numbers Matching Powertrain. Purchased from the Lady that bought it new. Baltimore Built (11A). 2) 66 GTO Survivor. “Factory” Cameo Ivory Paint with Red Pinstripe, Red Interior. OEM Numbers Matching Powertrain. Tri-Power (OEM Vacuum Linkage), Automatic "YR" code (1759 Produced). Fremont Built (01B), with the Rare 614 Option. |
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#4
10-25-2020, 09:31 AM
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My early '67 GTO has all "W" bolts, just like your far-right pic.
Dave |
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#5
10-25-2020, 04:59 PM
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My late '67 has 7-D's and 1-E.
Grant |
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#6
10-25-2020, 05:23 PM
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Have used Birchwood Casey cold blue for bolt restoration. It's a gun blue, available at gun shops, and won't peel or chip or come off like some paints and coatings. It looks just right, too. YMMV.....
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Jeff 
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#7
11-08-2020, 11:56 AM
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My early Feb. Pontiac plant built 67 uses the "D" marked flange bolt, 8 of them. The bolt head is not recessed like in the previous pics, but flat across the top (other than the raised "D") with no edge around the hex.
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Jason |
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