double hump or 882 heads

Discussion in 'High Performance Modifications' started by 81phaseII, Mar 24, 2012.

  1. 81phaseII

    81phaseII New Member

    Feb 20, 2012
    jeff city MO
    i have a 355 with flat top pistons running 882 heads with a lunati 213/219 duration .454/.468 cam edelbrock preformer eps and a 600 cfm edelbrock carb all in a 80 camaro the engine runs strong but i recently aquired a set of 461 double hump heads they have a 3 angle valve job and screw in studs i know the swap will raise compression but is it worth the swap? any info is appreciated and worth the imput. thanks
  2. cmonson

    cmonson Veteran Member Gold Member

    Apr 7, 2006
    Calgary, Alberta
    Yes, besides raising compression I believe the humps also will flow better. As a side note there are some who get good results with a good port job which bring them close to a modern day aluminum head. Something to consider before installing them.
  3. old blue 75

    old blue 75 Veteran Member

    Mar 23, 2007
    The combustion chamber is worth some hp also.
  4. ProStreet383

    ProStreet383 Veteran Member

    May 23, 2007
    The doublew humps flow better, will raise the compression and they have a better chamber design. 882's suck.
  5. 77_4speed

    77_4speed Member

    Mar 1, 2012
    hesperia, CA
    But the 461's don't have accessory holes on the front of them, right? Will that be an issue. I was going to put a set of 461's I have on my '77, but couldn't for that reason.
  6. Mike-78 Z-28

    Mike-78 Z-28 Veteran Member

    Mar 4, 2003
    ElDorado Arkansas
    They add to the expense but you can get conversion brackets here
  7. strstk71

    strstk71 Veteran Member

    Aug 12, 2005
    Surrey BC Canada
    or you could just drill and tape the head for the accessorys
  8. scot1074

    scot1074 Veteran Member

    Jun 3, 2004
    Prospect Ct, USA
    If you can you should try and at least gasket port those heads! But like others said there is no acc. holes and if you drill them you run the risk of oil leaking. just make sure to use something on the threads. I used these same heads in my vega. I had to use the short water pump and pulleys. I hated that setup, I keeped thoughing the belt.
  9. hhott71

    hhott71 Veteran Member Lifetime Gold Member

    Mar 30, 2001
    Joplin Mo. 64801
    Go to Vortec heads, or find some 041, 186, 492 heads.
  10. hogg

    hogg Veteran Member

    Dec 29, 2000
    I have used an am using the 461 double hump heads , these have been on for 4 years with no trouble, drilled the holes and put in studs with sealer, the place where you drill is very thin and goes into water jacket or the oil, seal good,also pined the rocker studs.

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