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Ideal iron heads for a trail/street BBC?

Discussion in 'The Garage' started by mofugly13, Dec 13, 2005.

  1. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    I anm going to be rebuilding a 454 I got from RyanB. over the next year or so, but would like to start acquiring parts now. It's got the peanut port heads. I understand these run out of breath at around 4500rpm. My K5 is for trails and road trips to trails, and Oregon to visit my brother. I am not going for anything wild, but warmed over compared to stock. Would I be better off looking for a set of big oval heads? I plan on pocket porting and maybe going to bigger valves, and an RV cam. Should I keep the peanut ports, maybe grind the ports to match the intake, or should I look for some large oval port heads? I am very patient when it comes to finding the right parts for the right price, so it's not like I'm in any hurry. What would you all do? I dont want any high dollar aftermaket heads, just you all's opinion on the best stock heads for the kind of driving we do.

    EDIT: I am hoping to get a Mercruiser MPFI setup for it, if that makes any difference, but that will depend on if I can find one at the right price.
     
  2. Jimbo*

    Jimbo* 1/2 ton status

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    Try a set of BBC vortec heads. They are somewhat of a sleeper, as compared to the popularity of SBC vortec heads. They will wake up a BBC just like a SBC. I too am looking for the mercruiser efi setup for my project; 89 454, 396 crank to destroke it to 427, vortec heads and cam/ valvetrain, and MPFI-should be a runner.
     
  3. bayou blazer

    bayou blazer 1/2 ton status

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    I am currently building up a 496 for my Jimmy and am using a set of large oval port iron heads for the build up. 781 castings that I am putting bigger valves in and getting some bowl and port work from a racer friend of mine. I have told him the application and he won't get too crazy with the head work. Mostly cleaning up, port matching and unshrouding valves. They are plentiful and cheap. I paid less than $100 for the pair that was in excellent shape.
     
  4. k20

    k20 3/4 ton status

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    yeh set of 049 or 781s, with a little porting and some 2.19/1.88s, and youll be set. I get 049s on mine, only way to go imo.
     
  5. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    That's pretty much what I figured. I don't think the vortec heads will work with my mark IV block, I have read it's a bitch to get the water passages to seal properly. K20, what are the specs on your engine, cam, pistons, compression ratio? What kind or torque/hp are you loking at?

    I think I'll start looking for some 049 or 781's.
     
  6. supersize75k5

    supersize75k5 OrganDonorRacing.com

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  7. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    DOH! Thanks supersize. Too bad I'm friggin broke right now, it's exactly what I'm looking for. ****!
     
  8. Thunder

    Thunder 3/4 ton status

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    Why not just go with TBI and a set of 781s, headers, mild cam, ect. TBI is Cheap, easy to Mod, gets good MPG, makes great torque, Be a lot easier and cheaper than adapting a marine system to 4x4
     
  9. Bad Karma

    Bad Karma Registered Member

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    I have a set of 781's on my 454. About what does it cost to have these mods done? I was looking at a set of Merlin II's, but they run around $1400+.... Just want to weigh the options. :D
     
  10. k20

    k20 3/4 ton status

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    machine work for the valves, probably around 200 bucks, valves are around 200 bucks for both intake & exhaust, and porting I did with couple different grinding wheels.
     
  11. supersize75k5

    supersize75k5 OrganDonorRacing.com

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    I hope you are talking about their cast version...


    I coundnt touch a set of aluminum big block heads for less then 2 grand:(
     
  12. Bad Karma

    Bad Karma Registered Member

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    Yeah, that's what I meant. The basic cast iron, hydraulic flat-tappet version. They do have some nice features, though. I would love to run them. Maybe someday..... :crazy:
     
  13. gauder

    gauder Banned

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  14. Brocky

    Brocky 1/2 ton status

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    I can get a set of vortec heads from a 96 454 for a decent price I'd say. If anyone is interested let me know I will phone him and look for a price if he still has them. I would say cheap. drop me a email if interested or post up. cbrockerville@hotmail.com
     
  15. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    For the bling factor, my friend.:D
     
  16. Yukon Jack

    Yukon Jack 1/2 ton status

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    I put a 1989 1 ton's 454 in my 69 K20. I ditched the TBI and put on a Weiand Action Plus intake, Jet Stage II 800 cmf q-jet, a Crane Energizer 266 cam, lifters and springs, along with Comp Cams Magnum rocker arms. I went ahead and stayed with the peanut port stock heads. These changes seem to work very well with my K20. It has all the power I could want and definitely goes past 4,500. If I'm getting on the gas hard I hit 5,000 with no problem.

    The peanut port heads are actually good for low end torque which is exactly what you want with a heavy 4wd. I sure gave thought to changing heads when I had an issue requiring them to be pulled off, but I took the advice of my machine shop and kept them.
     
  17. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    My dad did the iron heads that were on Wally out of some car large ovals. Bigger valves, flycut bowls, blending all of it, cc-ing the chambers, contouring the block to unshroud the valves, etc. It all worked really nice with the 468 but the peanuts would probably have been a bit better under 2K rpm. Keep in mind a small displacement motor like a 396 won't need the air a larger port can provide.
    Being patient works well, a set of edelbrock's found me for a very reasonable price but it was a year before I used them and wasn't looking when they showed up.
     

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