Casting marks on a set of heads - GM Forums at GM High-Tech Performance Magazine

Casting marks on a set of heads

  
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Casting marks on a set of heads

 
86TPIZ28TTOP 86TPIZ28TTOP
New User | Posts: 2 | Joined: 06/09
Posted: 06/26/09
08:05 PM

I just bought a SBC 350 and it has a set of heads with some casting marks that I have never seen before. I do not have the numbers yet but the marks are three equal length bars that are about 3/4's inch long. on one side of the head the bars are flat ( they look machined )and the other side they are rounded surface.What do they stand for? Does anyone know what the valve size might be?  

 
Pontiacman8 Pontiacman8
New User | Posts: 28 | Joined: 01/08
Posted: 06/30/09
02:55 PM

Sounds like those low performance truck heads but not sure post a pic of them or post the casting numbers and then I can tell you for sure. If they are those low performance truck heads they most likely will have 1.72/1.50 valves and 76cc chambers.  

 

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