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Thread: 2003-04 Cobra Motor Swap

  1. #1
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    2003-04 Cobra Motor Swap

    I have a quick question regarding this 03-04 Cobra Motor Swap. I know that you can swap the Cobra motor in the Marauder, but you have to "notch
    the driver's side frame rail to clear the alternator. BUT, my question is, can I purchase the relocation brackets made for the Eaton Swap to avoid notching the frame? Are there any safety concerns notching the frame rail correctly?

    Are there any other considerations (other than the usual Eaton swap stuff-moving battery, fuel pump upgrades, tune etc...) for the dropping in this fully dressed Cobra motor in my 04 Marauder?

    "RescuRauder", Born on 09/02/2003 & rescued on 04/05/2013. #236 of 3214 and #62 of 1237 in Black. CAI, Some kind of tune, Kooks Headers, X-pipe w/Hi-Flow cats, Magnaflow mufflers, Resonators removed, 4.10's, Metco U&L CA and Watts link, Drilled & slotted rotors, now BOOSTED!! Eaton Swapped 12/29/19!!
    Sold! 1986 Mustang GT Vert, Black, 5spd, new short block, Powerheads, Crower 15511, gears, exhaust etc.

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  2. #2
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    oil pan, i think front cover too needs swapped. front cover might only need it when using like a Aviator motor to replace. not 100% sure on cobra swap,other than oil pan im pretty certain need changed.
    Last edited by RubberCtyRauder; 03-21-2018 at 09:41 AM.
    2004 SB Ported Trilogy 48
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  3. #3
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    I just helped the guy do this 2 months ago. If you use your Marauder timing cover oil pan oil pickup tube and oil filter adapter you won't need to notch the frame. you'll also need an 8 bolt flywheel cuz the Cobra engine has an a 8 bolt crankshaft

  4. #4
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    Notching the frame is red neck.

    Get the brackets and COT from Jerry.
    Last edited by martyo; 03-21-2018 at 11:16 AM.

  5. #5
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    Quote Originally Posted by martyo View Post
    Nothing the frame is red neck.

    Get the brackets and COT from Jerry.
    Lol yes it is.

  6. #6
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    Quote Originally Posted by Themarauderguy View Post
    I just helped the guy do this 2 months ago. If you use your Marauder timing cover oil pan oil pickup tube and oil filter adapter you won't need to notch the frame. you'll also need an 8 bolt flywheel cuz the Cobra engine has an a 8 bolt crankshaft
    Thanks!I thought the alternator in the Cobra position contacted the frame. Does the Marauder timing cover eliminate that problem?

    Quote Originally Posted by martyo View Post
    Notching the frame is red neck.

    Get the brackets and COT from Jerry.
    LOL, I know. I threw that out there for some extraout of this post, lol.

    "RescuRauder", Born on 09/02/2003 & rescued on 04/05/2013. #236 of 3214 and #62 of 1237 in Black. CAI, Some kind of tune, Kooks Headers, X-pipe w/Hi-Flow cats, Magnaflow mufflers, Resonators removed, 4.10's, Metco U&L CA and Watts link, Drilled & slotted rotors, now BOOSTED!! Eaton Swapped 12/29/19!!
    Sold! 1986 Mustang GT Vert, Black, 5spd, new short block, Powerheads, Crower 15511, gears, exhaust etc.

    1968 Ford (Galaxie) XL fastback, 390, factory buckets & auto on floor
    2011 Shelby GT500, Kona Blue with SVT Performance Pkg & Navigation, VMP tuned ~550rwhp/550rwtq. Finally Blown!

  7. #7
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    I also figure by the time you notch the frame "correctly", it would probably cost the same as Jerry's brackets.

    "RescuRauder", Born on 09/02/2003 & rescued on 04/05/2013. #236 of 3214 and #62 of 1237 in Black. CAI, Some kind of tune, Kooks Headers, X-pipe w/Hi-Flow cats, Magnaflow mufflers, Resonators removed, 4.10's, Metco U&L CA and Watts link, Drilled & slotted rotors, now BOOSTED!! Eaton Swapped 12/29/19!!
    Sold! 1986 Mustang GT Vert, Black, 5spd, new short block, Powerheads, Crower 15511, gears, exhaust etc.

    1968 Ford (Galaxie) XL fastback, 390, factory buckets & auto on floor
    2011 Shelby GT500, Kona Blue with SVT Performance Pkg & Navigation, VMP tuned ~550rwhp/550rwtq. Finally Blown!

  8. #8
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    Quote Originally Posted by martyo View Post
    Notching the frame is red neck.

    Get the brackets and COT from Jerry.
    LOL....
    Awwwww, just throw in an LS motor and be done with it!......
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  9. #9
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    Your best bet is Jerry’s brackets, but if you actually have the cobra engine you’ll still need to relocate the alternator in a custom fashion if you’re swapping timing covers and oil pans then you’ll see that the cobra cover has an extra hole in it and you will have to drill and tap that on the Marauder block.


  10. #10
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    I'm in the same boat I have a complete pull out of a 2003 cobra with only 20k miles minus the accessories.
    Quote Originally Posted by Themarauderguy View Post
    If you use your Marauder timing cover oil pan oil pickup tube and oil filter adapter you won't need to notch the frame.
    ok so it clears with the marauder oil filter adapter ?

    Quote Originally Posted by mm svt View Post
    ...if you actually have the cobra engine you’ll still need to relocate the alternator in a custom fashion if you’re swapping timing covers and oil pans then you’ll see that the cobra cover has an extra hole in it and you will have to drill and tap that on the Marauder block.
    why do i need to relocate the alt if it clears using the marauder adapter? whats the purpose in drilling and tapping it on the old marauder block that's not being used if i have the complete cobra block going in?

    can anyone verify?

  11. #11
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    Yes use the marauder oil filter housing adapter. Put it on the Cobra engine The Marauder timing cover and The Marauder oil pick up tube. you need an 8 bolt flexplate flywheel besides that you're good. If your supercharged you relocate the alternator with Jerry's Eaton swap brackets. if you're not it'll stay in the same place it was before from the factory on the marauder.

  12. #12
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    He meant Marauder timing cover on a Cobra block. Most of us just fill the extra hole with epoxy and sand smooth. Never a drip of oil.


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  13. #13
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