Head Stamp Symbols
04-15-2007, 02:34 PM
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Car: 91 RS Camro Ttop
Engine: 5.0 LO3
Transmission: 700R4
Axle/Gears: 3.42
Head Stamp Symbols
i ran across a set of heads that had a marking on the ends that I didn't recognize. It is the shape of a pyramid sort of like this.
__/\__
l l
Again it's a raised stamp similar to the double hump. The engine numbers ran to be a 350 used between 69-72 Z28s. I thought a stock 350 was a stock 350 till later in the 70's. Any chance any of you hot rod guys or old school mechanics recognize this symbol and if so do you have the numbers valve size/combustion chambers for them? The head look to be in decent shape, appear to have been ported and probably worth a rebuild.
__/\__
l l
Again it's a raised stamp similar to the double hump. The engine numbers ran to be a 350 used between 69-72 Z28s. I thought a stock 350 was a stock 350 till later in the 70's. Any chance any of you hot rod guys or old school mechanics recognize this symbol and if so do you have the numbers valve size/combustion chambers for them? The head look to be in decent shape, appear to have been ported and probably worth a rebuild.
04-17-2007, 04:22 PM
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Car: 92 RS(sold) 1989 IROC-Z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: ones that turn
Re: Head Stamp Symbols
interesetring I know I've seen that before in a pic our somethin
Im curious now too I hope some one can solve this 
Im curious now too I hope some one can solve this
04-17-2007, 04:53 PM
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Car: 91 RS Camro Ttop
Engine: 5.0 LO3
Transmission: 700R4
Axle/Gears: 3.42
Re: Head Stamp Symbols
it would be great if this turned out to be a 70 lt-1. 360hp stock.
04-20-2007, 05:27 PM
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Re: Head Stamp Symbols
1968 3970010 327 - - 2 A
1969-79 3970010 350 185 370 2 or 4 car, truck, Vette
This is the block number's result. How could you tell the difference between the 350 and 327?? the 185 is low hp rating and 370 max. 2 or 4 bolt mains, I'm a dumbazz I just answered my own question sort of, pull the pan and if it has 4 it's deffinatley a 350, if not a 4 bolt main how can I distinguish then?
The head number is 8795898, searching found nothing for this number, it's stamped under the rocker arms. If I change all the 8's to 3's it comes up as 327 heads, but unless someone's playing a good joke on my eyes, they are 8's I used blue wolf and a rag and scraped down to bare metal to make sure I got the numbers right, anybody got anything?????????????
1969-79 3970010 350 185 370 2 or 4 car, truck, Vette
This is the block number's result. How could you tell the difference between the 350 and 327?? the 185 is low hp rating and 370 max. 2 or 4 bolt mains, I'm a dumbazz I just answered my own question sort of, pull the pan and if it has 4 it's deffinatley a 350, if not a 4 bolt main how can I distinguish then?
The head number is 8795898, searching found nothing for this number, it's stamped under the rocker arms. If I change all the 8's to 3's it comes up as 327 heads, but unless someone's playing a good joke on my eyes, they are 8's I used blue wolf and a rag and scraped down to bare metal to make sure I got the numbers right, anybody got anything?????????????
04-20-2007, 06:24 PM
#5
Re: Head Stamp Symbols
http://www.mortec.com/castnum.htm
If I had a penny for every time a buddy thought he had a rare hi-po head, or block, only to find out it was run of the mill smog era stuff, I'd be a rich man.
3970010 is such a common casting that many people have the number memorized... Chances are it's a 350, it could be 2 or 4 bolt mains.
Clean the casting numbers with carb cleaner, and then compare them to the list at Mortec. Also check the stamp on the flat spot in front of the passengers side head... That will tell you what it came in originally, if you can find the definitions.
If I had a penny for every time a buddy thought he had a rare hi-po head, or block, only to find out it was run of the mill smog era stuff, I'd be a rich man.
3970010 is such a common casting that many people have the number memorized... Chances are it's a 350, it could be 2 or 4 bolt mains.
Clean the casting numbers with carb cleaner, and then compare them to the list at Mortec. Also check the stamp on the flat spot in front of the passengers side head... That will tell you what it came in originally, if you can find the definitions.
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