Which bbc oval port heads should I use?

Discussion in 'High Performance Modifications' started by meangreen73, Apr 3, 2012.

  1. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    Ok to make a long story short the 402 in my car spun a rod bearing. I guess it had more miles then I thought on it. So I ended up getting a killer deal on another 402 with a ton of parts. This ones a fresh rebuild with .40 over pistons. I was looking for a 454 but I got a deal I couldn't pass up. Anyway the motor came with 2 sets of heads. The first set are peanut port 14081045 heads. They are freshly redone but I know they aren't good for performance so there out. The next set are 3931063 heads which look to have low miles on them and I also have the heads off my old motor which are 3964290 heads.

    So my question is which heads do I use? The 290's or 063's? The car sees the dragstrip a good bit but never sees over 6500 rpm which is why I have oval ports. I'm using a solid comp 282s cam (244/252 dur @.50 and .590/.598 lift). It's got a weiand stealth intake and Holley 750 dp. It's also got a 3500 converter and 4:10 gears.
     
  2. 1980RS

    1980RS Veteran Member

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    Jun 17, 2006
    MN

    Here is something for you to think about. I had a freind who wanted to put some 781's on his 402 and I said they are too big and laughed at me. I said "do what you want but the car will be a pig", He put them on his car and the darn thing only ran high 13's and he was not happy (who is laughing now).
    He came over to the house and asked if I had any ideas how to make the car faster and I again said get rid of the heads. He aske why this was suck a big deal to me, so I told him. Would you put a set of 265cc runner heads on a 406? of course he said no. Then why in heck would you do that to a 402.
    Puzzled of course his brain started to work better and he asked what I he should use. I told him to get a set of the peanut smog heads of a late 454 and do some minor port work and put in the bigger intake valve but not the exhaust (big blocks have enough exhaust valve as it is). So he did just that and all else the same on the car except for some tuning and he went to the track and ran get this, 12.89.

    I have had very good luck with dome 11.0 comp 396's with 290 heads but the smaller cc intake ports will shine on that 402 you have also. Besides you can get a set of those smog heads for like $50 some places. If I had to pick from what you have I would say use the 290's.

    781's and 290's both have 265 cc intake runner heads me thinks.
     
  3. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    I totally agree with what ur saying. It makes no sence to run rectangle ports on a 396 or 402 unless u have a big enough cam and ur reving it enough to make use of those big ports. I myself am leaning towards the 290's. I just didn't know much about the 063's and I heard they were good performance heads.
     
  4. 450bench

    450bench Veteran Member

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    Feb 25, 2002
    memphis, tn-shelby
    The 063s and the 290s are roughly the same and I like them both especially on a 396
     
  5. jakeshoe

    jakeshoe Veteran Member Lifetime Gold Member

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    Dec 8, 2000
    Republic of Texas
    I would run the peanut ports with mild porting, an oval intake, if this is a primarily street oriented BBC.
     
  6. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    I drive it to the local cruise once in awhile and drive it here and there but it's probably gonna see the track more.
     
  7. jakeshoe

    jakeshoe Veteran Member Lifetime Gold Member

    8,859
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    Dec 8, 2000
    Republic of Texas
    The ovals will work good too. The peanut ports work better than most think, even for drag racing.
     
  8. meangreen73

    meangreen73 Veteran Member

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    Feb 16, 2008
    Pittsburgh
    I'll have look into that. I wasn't really planning on putting to much money into the heads I have because I want to switch to aluminum heads down the road.
     

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