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? for those with big blocks

Discussion in 'The Garage' started by GRAYTEXK5, Jul 14, 2004.

  1. GRAYTEXK5

    GRAYTEXK5 1/2 ton status

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    for those of you that have big blocks in your K5's...did you have to use different frame stands, or did it just bolt in? and what headers did you use? I talked to summit and jegs, and was thinking about some hedman elite headers...and they both said I have to get factory big block frame stands. is that true, or will they clear without them? just trying to find out what kinda problems I may run into, before I decide what to buy. thanks.
     
  2. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    My big block bolted right in with the factory small block motor mounts. I have headers off a 1978 nova on mine, but I can not say for sure that they would work for you as my frame may have be modified for them to fit. /forums/images/graemlins/dunno.gif
     
  3. islandblazin

    islandblazin Registered Member

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    I have a 396 mounted onto a 350 small block mounts in my 72 blazer and it works great. except i had to cut the fan gaurd a little cause the belt rubbed a bit.
     
  4. big pappa b

    big pappa b 3/4 ton status

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    Mine bolted right in too using the small block mounts. I think the only difference is the small block mounts might make it sit up a little higher.
    As for headers, I running Hooker Super comps made for a big block blazer
     
  5. GRAYTEXK5

    GRAYTEXK5 1/2 ton status

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    what kind of headers are you running, if any? I think what they were saying, was that I needed the frame stands for those particular headers. they said the hookers didn't say anything about it. but I was wanting to go with the elites, because they were cheaper.
     
  6. RingMaster4x4

    RingMaster4x4 1/2 ton status Premium Member

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    mine are headmen comps
     
  7. big pappa b

    big pappa b 3/4 ton status

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    Mine are the full length stle like the ones pictured only ceramic coated and covered with mud /forums/images/graemlins/frown.gif

    [​IMG]
     
  8. Yukon Jack

    Yukon Jack 1/2 ton status

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    What year K5 are you talking about?

    I put a big block in my 69 K20 using the 69's small block motor crossmember but had firewall issues. I used Dynomax 67-87 2WD BBC headers fit, part number 86022 with a little frame grinding on the passenger side. Driver side fit perfectly.
     
  9. GRAYTEXK5

    GRAYTEXK5 1/2 ton status

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    it's a 79
     
  10. 85 blazer

    85 blazer 1/2 ton status

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    I used dynomax headers for a 2wd and the stock small block frame mounts withe the 454 engine mounts no problems at all
     

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