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#1
03-23-2008, 03:01 AM
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BB Chevy Intake Manifold Bolts..
Trying to find out if there is any difference between the bolts used on the cast iron intakes vs. the aluminum ones...and were there changes in bolts design (markings, style, etc) from the early engines 65-68 and the newer stuff 69-70..trying to sort out a pile of different bolts I have to help a friend. Thanks
 wilma
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02 Berger 380hp #95 Lots of L78 Novas Join National Nostalgic Nova! 70 Orange Cooler 69 Camaro 
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#2
03-23-2008, 04:04 AM
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Re: BB Chevy Intake Manifold Bolts..
Or.........Just call D&R........One of our Sponsors, and order some..............
 Ken 
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 The Best things in life......Aren't Things
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#3
03-23-2008, 04:26 AM
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Re: BB Chevy Intake Manifold Bolts..
They are different...believe they are plated differently and have different head markings.
Eric
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#4
03-23-2008, 06:23 AM
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Re: BB Chevy Intake Manifold Bolts..
Aluminum intake bolts have a shoulder built into the bolt so not to "dig into" the softer aluminum. Cast iron intake bolts do not have the shoulder..BKH
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#5
03-23-2008, 06:28 AM
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Re: BB Chevy Intake Manifold Bolts..
The cast iron bolts were shoulder-less and I believe black
posphate in color, The aluminum intake bolts were shouldered and silver cad or similar in color. Nuch
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#6
03-24-2008, 03:16 AM
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Re: BB Chevy Intake Manifold Bolts..
I have an original 68 325hp motor that came with my 67 chevelle I am restoring. It has the cast iron intake with shoulder less bolts with a washer. The letter A with three lines around the A. They were painted orange? If you need a closer look Tom feel free to stop buy when you are up my way!
Jason
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#7
03-24-2008, 04:09 AM
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Re: BB Chevy Intake Manifold Bolts..
I've seen the letter 'A' and letter 'M' with three lines around them as well.
Can anyone explain what the letters might designate?
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Craig S. "I saw Elvis At 1000 Feet" John Force.
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#8
03-24-2008, 04:13 AM
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Re: BB Chevy Intake Manifold Bolts..
A or M would be a manufacturers mark... the 3 dashes are the grade ddesignation for the bolt.
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~JAG~ NCRS#65120 68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car #21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built. 71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist. NUMEROUS Lemans blue Camaros, Monza Red and Daytona Yellow Corvettes & a Chevelle or two... Survivors, restored cars, & other photos https://picasaweb.google.com/lh/myphotos
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#9
03-24-2008, 06:09 AM
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Re: BB Chevy Intake Manifold Bolts..
SEE misc bolts at www.amkproducts.com
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Chuck Sharin [email protected] Auburn,WA (30 miles South of Seattle) 70 Camaro R/S Z-28, L-78, R/S SS 69 Camaro COPO "recreation"
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#10
03-24-2008, 06:13 AM
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Re: BB Chevy Intake Manifold Bolts..
[ QUOTE ]
Aluminum intake bolts have a shoulder built into the bolt so not to "dig into" the softer aluminum. Cast iron intake bolts do not have the shoulder..BKH [/ QUOTE ] That go for small blocks? Thought those were shoulderless and used without washers...
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1969 Z28 1972 Corvette
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