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Old Sep 23, 2017 | 10:06 PM
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Default 327/340

Anybody know what are the correct bolts for a 63 340 motor? Looking at pictures of different motors is not helping so far.
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Old Sep 23, 2017 | 10:19 PM
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There was serveral bolt suppliers for every application. So there is no correct answer
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Old Sep 23, 2017 | 10:45 PM
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Which bolts?
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Old Sep 23, 2017 | 11:06 PM
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My bad..aluminum intake manifold bolts

Last edited by Shift_Happens; Sep 23, 2017 at 11:06 PM.
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Old Sep 23, 2017 | 11:14 PM
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Default bolts

Originally Posted by 1973ragtop
My bad..aluminum intake manifold bolts
Call corvette Pacifica They have them tell them what year 63 or 62.
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Old Sep 23, 2017 | 11:15 PM
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I do not have the '63 NCRS judging guide here, but the '65 L76 365 aluminum intake takes 9/16" black phosphate hex head bolts with no washers, which are typically painted aluminum doing the intake painting process, with head marks "A", "M", "TR", "UR", or "FP".

Since I quoted the wrong year ('65 vs '63) someone who knows will come along and give you the correct answer.
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Old Sep 24, 2017 | 09:16 AM
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Originally Posted by Easy Rhino
I do not have the '63 NCRS judging guide here, but the '65 L76 365 aluminum intake takes 9/16" black phosphate hex head bolts with no washers, which are typically painted aluminum doing the intake painting process, with head marks "A", "M", "TR", "UR", or "FP".

Since I quoted the wrong year ('65 vs '63) someone who knows will come along and give you the correct answer.
See post two
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Old Sep 24, 2017 | 09:51 AM
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From the latest '63 JG:
"Known original 1963 base engine, L75, L76 cars use with head marks of "M", "TR", or "AP" inscribed in a circle to attach the intake manifold or base plate. The bolts on cast iron intakes are painted engine orange during the engine painting process while the bolts on aluminum intakes may be black phosphate, cadmium or zinc plated and may be partially covered with silver paint."

Rich
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