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#1
01-24-2006, 08:15 AM
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70 Big Block Chevy Head ???
im taking my original motor apart for a rebuild and ran in to something i need some help with.
my car was built the second week of Dec. 69 and one head is L..12..8...3931063...with flat seat plugs and the other is L..2..9....3964290...with taper seat plugs i know early cars could have either head but shouldnt both heads have flat seat plugs? thanks Donnie
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69 SS L78 Chevelle 70 SS 396 Chevelle 
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#2
01-24-2006, 06:05 PM
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Re: 70 Big Block Chevy Head ???
Not really.They produced the #290 head with either tapered or flat spark plug seats.Your example of two different heads is unique,but not impossible.
What is the Tonawanda assembled date on your engine pad?
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#3
01-24-2006, 09:59 PM
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Re: 70 Big Block Chevy Head ???
Rick,
its TI205 CTW on the engine pad but according to my P.O.P. the I should be a 1 so Dec. 5th right? be kind of a pain in the a$$ getting 4 flat seat 13/16 and 4 taper seat 5/8 to do a plug change.
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69 SS L78 Chevelle 70 SS 396 Chevelle
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#5
01-24-2006, 10:56 PM
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Re: 70 Big Block Chevy Head ???
So whats your point??
ever had a can of soup that keeps getting pushed around in the back of the cupboard and before you new it. its out of date.
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69 SS L78 Chevelle 70 SS 396 Chevelle
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#6
01-25-2006, 05:52 AM
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Re: 70 Big Block Chevy Head ???
Donnie,
What's the block casting date?
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Howard Growing old is a certainty, growing up isn't
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