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What size cylinder heads do I have??

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Brian 89KBlazer, Mar 31, 2001.

  1. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    On a 1989 TBI 350?? Are they 68cc, 72cc, 76cc,???

    Thanks
    Brian
    89KBlazer
     
  2. Twiz

    Twiz 1/2 ton status

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    Best guess; 64cc.
    I checked my fav catalog (G.M. Performance Parts) and looked for years, found p/n 10125377 cyl head. It is used on 285hp engines, has 1987 and latter intake bolt pattern
    Check for a casting number 141013978 or 14096217, if you got those, then its a match (I think). Thats my best guess. Hope it helps.

    Twiztid
     
  3. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    Thanks Twiztid but their the stock 1989 350 TBI heads. I guess I'm the only one in the world who has those!!![​IMG][​IMG]
    Come on!! Some one must know! I need to know so that I can order the right 383 stroker kit to end up with the right comp ratio.

    Brian
    89KBlazer
     
  4. ftn96

    ftn96 1/2 ton status

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    Not sure about the 89's but I have a 90 adn my heads are 60cc. That may give you a ball park. Get the VIN and call the dealer adn ask them.

    Will work for beer, parts and tools.
    90 Jimmy 350TBI-700R4-241-33" BFGs-10 bolts w/4.10's
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  5. Twiz

    Twiz 1/2 ton status

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    Try calling a dealer for the cyl head p/n, I don't know if they can get a cc rating on their data base, but it might help chase it down. I would think its close to those 64cc heads (above)

    Good luck
    Twiztid
     
  6. bablazer73

    bablazer73 1/2 ton status

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    I have a GM parts book that says 87 up heads are 64cc.

    your right. I don't understand the jeep thing!
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    I am including this only because you are building a 383...those heads suck. i thinkyou would be much better served by heads that are capable of supplying the power that the 383 can supply. I posted that there is now a TBI vortec intake, and with that, you could run Vortec heads. Not sure if you already have TBI, if all you need is the intake or not...

    Just seems like a waste to build a 383 and have it restricted by crappy heads. IMO

    Dorian
    My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
     

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