Looking for info on 840 cylinder heads - NCRS Discussion Boards

Looking for info on 840 cylinder heads

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  • Joseph E.
    Very Frequent User
    • February 28, 2006
    • 175
    #1

    Looking for info on 840 cylinder heads

    I've got a set of GM 840 cylinder heads on a car that I own and was looking for some information about them. They are rectangular port heads with Hi-Perf cast into them but I was wondering if they are open or closed chamber and what size the intake and exhaust valves would be. Any input would be most appreciated. Thanks.

    Joe 45420
    Tags: None
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    • Wayne M.
      Expired
      • February 29, 1980
      • 6414
      #2
      Re: Looking for info on 840 cylinder heads

      3919840 heads are closed chamber design with stock intake valve diameter of 2.19" and exhaust 1.72".
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