351w swap in a 76 cobra ll?

Discussion in 'Mustang II' started by crazycatxr7, Apr 6, 2009.

  1. crazycatxr7 New Member

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    what has to be done for a 351w swap, I came across hedman headers that i guess is made specifically for this swap,i don't know if they will work, i have a c4 trans in there right now,,and those headers aren't cheap there like $700.
  2. Steel Steeds New Member

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    Swapping in a 351w isn't all that hard, if you use the factory exhaust manifolds. The two different headers available for the swap involve some work. I think (not 100% sure) that the Hedman's require the motor to be repositioned by using a plate. Another brand requires a battery relocation and some modification to the fender wells.
    Also, depending on the intake/carb setup you go with, cutting the hood for clearance may be needed. If you go with a low rise intake, you can manage it without cutting.
    Other than that, it's a drop in and go. No changes needed to fit the radiator, shroud, starter, etc. I did buy a bracket to adapt the 302 power steering bracket to the 351, but only because I wanted something that looked better than the hacked piece that was in there.
    Good luck.
  3. crazycatxr7 New Member

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    swap

    the headers that hedman offer, i'm pretty sure they go right underneath everything, so from the heads straight down, so it can clear, cuz i guess they cant fit through where the tranny is..and how does that whole motor plate thing work..
  4. COBRAIIW New Member

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    The 302 oil pan will not fit the 351w, so the oil pan for the 351w must be used and modified to clear the rack and pinoin steering.

    Attached Files:

  5. crazycatxr7 New Member

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    what kind of headers are those,, will they clear my c4,,
  6. Steel Steeds New Member

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    You're absolutely right, I totally spaced that. I had a 351w pan customized with a baffled 7 qt. deep sump. Cost a bit, but looks and works great.

    I still have the original pan off my 351w if somebody wants it. Ready to go to work in any Mustang II with a 351w. It is NOT pretty, but it never leaked. It's basically the original Mustang II 302 lower part, welded to a 351w upper pan rail, and then beat on to make it fit. The previous owner did a lot of redneck engineering...
    If anyone can use it, $20 plus shipping and the pickup is included.
  7. crazycatxr7 New Member

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    so what do u have to do get a 351w pan and take it to a shop and have a modified to fit cuz of the steering rack,
  8. COBRAIIW New Member

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    The headers I used are old Blackjacks that came with the car.
    The oil pan I modified myself. I cut out the section that wouldn't clear the steering, and welded a section in that did.
  9. Steel Steeds New Member

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    That would be really expensive. Even with my new custom pan, after they mocked it up I brought it home and bolted it to the motor. It needed a bit more massaging to clear the crank. Then I dropped the motor in the car, and it needed more clearancing to clear the rack. I went through that process twice, but in the end if fit like a glove.
  10. BIGRED77FORD New Member

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    351W Swap

    I'm new to this website, so bare with me.

    I've done this swap in 1980 Mercury Bobcat.
    Headers - Hedman 85601
    Motor Plate - Hedman 56066
    Tatol Performance - F351 Modified Oil Pan/Oil Pump Pickup

    I can send you pics.
    E-mail at BIGRED77@q.com for your addy
  11. BIGRED77FORD New Member

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    351 Swap

    I do have a extra oil pan and oil pump pickup for the swap,
    Form Tolal Performance

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