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-   -   70 Big Block Chevy Head ??? (https://www.yenko.net/forum/showthread.php?t=84955)

Donnie 01-24-2006 08:15 AM

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

Mr70 01-24-2006 06:05 PM

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?

Donnie 01-24-2006 09:59 PM

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.

BARRY 01-24-2006 10:23 PM

Re: 70 Big Block Chevy Head ???
 
THE HEADS ARE ONE YEAR /APART//

Donnie 01-24-2006 10:56 PM

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 its out of date.

rubbinisracing 01-25-2006 05:52 AM

Re: 70 Big Block Chevy Head ???
 
Donnie,

What's the block casting date?

Donnie 01-25-2006 07:50 AM

Re: 70 Big Block Chevy Head ???
 
O.K. heres the scoop after Barry and I posted I got to thinking and called the second owner tonight. I remembered him asking me a couple of years ago if it still had a big plug and small plug head, but at the time I didn't think nothing of it sense it was setting in the corner of the garage and I was running the 502.

Well, he trashed the passenger side head in 1986 thats why I have a 063 big plug head, so now it looks like im in the market for a Nov. early Dec. 69 small plug taper seat 290 head.

Howard,
hope to see you and the family in Nashville this year.

Donnie


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