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350 HEADS.. ARE THESE GOOD

 
po_choppa
My first time was in a Chevy
Posts: 239
Joined: 08/08
Posted: 07/05/09 10:46 PM

CAST NUMBER 1023996. ARE THESE A GOOD CAST.  

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Pontiacman2
Moderator
Posts: 891
Joined: 01/08
Posted: 07/06/09 08:18 AM

Could not fine those casting numbers are you sure it is not 10239906  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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85_trans_am
I have an SS396 tatoo
Posts: 252
Joined: 05/09
Posted: 07/06/09 01:16 PM

10239906...96-up...350.........."Vortec 5700", "L31", 64cc chamber,
                               170cc intake port, 1.94"/1.5" valves
vortec heads are good  

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po_choppa
My first time was in a Chevy
Posts: 239
Joined: 08/08
Posted: 07/06/09 07:55 PM

SORRY THEY ARE 10239906. MISSED THAT LAST 0  

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po_choppa
My first time was in a Chevy
Posts: 239
Joined: 08/08
Posted: 07/06/09 07:55 PM

WHATS L31 MEAN  

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Pontiacman2
Moderator
Posts: 891
Joined: 01/08
Posted: 07/07/09 07:02 AM

Yes they are decent heads and the L31 is the RPO code or regular production option.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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Brothers Keeper
I love my Chevy Chevette!
Posts: 1
Joined: 01/18
Posted: 01/06/18 09:32 PM

Well they are banned from most modified dirt tracks for making to much power.LOL THEY ARE 1997 VORTEC HEADS. I HAVE PERSONALY HOGGED OUT THE INTAKE RUNNERS ON 2 SETS THEN ADDE 2.02 INT AND 160 EXHAUST I HAVE A SET ON MY 97 GMC SIERRA W/10.9 to 1 compression Its making 440 Hp and 460 ftlbs wit stock computer.sfi,and ignition  

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