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Blockhuggers for BBC in 1st Gen

Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by destinbeachman, Apr 26, 2007.

  1. destinbeachman

    destinbeachman 1/2 ton status

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    I have wanted to get rid of my old long-tube headers for a while now-they are rusted pretty bad,the flanges are warped,and they hang down 5 or 6 inches too low.During the winter wheeling season(yeah,it's backwards for me-I wheel in the winter and wrench during the summer)I sunk the '70 pretty bad and a short time after I got it running again the motor started to talk to me.So I tore it down thinking the worst.Turns out my gear drive took a crap,with one of the idler gears walking forward and eating up the rear of my harmonic dampener.That's a new one on me.Of course,by then I had already pulled most of the bottom end looking for chaos.So I'm putting her back together and improving and upgrading some of it and I decide to try some new headers.After finally deciding that a set of blockhuggers would probably fit i ordered a set from Summit and I think they'll fit fine.The collectors end up right behind the motor mounts and look like they will clear everything easily.I often see posts here asking what type of headers to use on a big block in a Blazer so I shot a few pics.BTW,the old ones were from a Chevelle,if I'm not mistaken.They were getting pretty dinged up cause they hung down too low.Thought this might help someone out. Cheers!

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  2. Big Blzn

    Big Blzn 1/2 ton status GMOTM Winner

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    :waytogo: Looks great. Are your plug wires going to fit well enough?:waytogo:
     
  3. Yukon Jack

    Yukon Jack 1/2 ton status

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    Nothin' as pretty as a BBC, well, almost nothin. :wink1:

    Looks great and it does look like those will work well.
     
  4. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    I am thinking of going shortys on my 454 in my 71. Mostly for going single exhaust on the drivers side since there isn't much room on the pass side for a exhaust pipe. Show pics of how it clears frame and all please. Is your engine in the stock location or moved forward at all?
     
  5. destinbeachman

    destinbeachman 1/2 ton status

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    It's actually set back about 6 inches on a custom crossmember.I'll post a few pics after I install it,probably this weekend.And no,I don't have any probs with the plug wires.I run them through a billet loom that mounts to the valve covers and drops them down from above.-Allen
     
  6. MNorby

    MNorby 3/4 ton status Premium Member GMOTM Winner

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    set back 6"??? Did you have to build a new firewall? I barely have any room with my 454 moved forward an inch.
     
  7. Burt4x4

    Burt4x4 3/4 ton status

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    Ya? You have to show us pics of that now :D :laugh:
     
  8. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    If he could just set it back a few more inches, the air cleaner would make a nice center console!!! Maybe cut a few holes in it for cupholders??? :thinking:



    :usaflag:
     
  9. destinbeachman

    destinbeachman 1/2 ton status

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    Just got the motor in and fired up again and took some pics.Was a tighter fit than I anticipated and I had to put some small rounded notches in the frame.Hated to do that but it was the only way.I still think I'm gonna like these headers much better than the old ones.No MNorby,I didn't build a new firewall.I didn't get the engine set-back across the way I meant to.The crossmember sits back about that much farther than stock,I'm pretty sure(mine didn't have one at all when I got it).I massaged the firewall a bit to get it in there the way I wanted it.I haven't seen any pics of how much clearance other guys have so I don't really know how well I did.Here are a few pics.If I had been back on here and seen your post I would have taken some of the firewall area while it was still easy to see.-Allen

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  10. bigblock72

    bigblock72 1/2 ton status Premium Member GMOTM Winner

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    Those headers fit pretty nice. Do you have a part number?
     
  11. 4bynut

    4bynut 1/2 ton status

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    Is the motor setting lower in the frame then stock? Also did you make your own crossmember or is it from a vendor? Thanks Jason
     
  12. destinbeachman

    destinbeachman 1/2 ton status

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    Crossmember is an old universal from Alston,cut to fit,of course and bent slightly to match the frame's taper.And the headers are from Patriot.Part #H8029 from Summit.-Allen
     

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