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  • 1 Post By 53 Chevy5
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Thread: 454 swap help
          
   
   

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  1. #1
    TXAG22 is offline CHR Member Visit my Photo Gallery
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    454 swap help

     



    Howdy, I知 new here but I once heard forums are the place to go for things like this and I知 all out of options. Recently I picked up a new project, more so my first project, and of course being me I have to go all out (because who wants to take things slow). I知 trying to swap a 454 big block into a 91 C1500 single cab which came stock with a v6 and a 5 speed manual. I have a clue as to what i need to do, but at the same time this is all new for me and I could use like a checklist or something or even just things to take into account. Literally any advice will help!

  2. #2
    NTFDAY's Avatar
    NTFDAY is offline CHR Member Visit my Photo Gallery
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    New motor mounts, probably a bigger radiator, different transmission and mount and probably different gears in the rear end to name a few.
    Ken Thomas
    NoT FaDe AwaY and the music didn't die
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    Wild Willie & AA/FA's The greatest show in drag racing

  3. #3
    glennsexton's Avatar
    glennsexton is offline CHR Member/Contributor Visit my Photo Gallery
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    Welcome to CHR!

    Here's a thread that is very similar to what you're wanting to do:
    1993 C1500 project: 4.3L to 7.4L swap > 454SS clone - The 1947 - Present Chevrolet & GMC Truck Message Board Network

    Lots of good ideas and this guy has already researeched all the bits and pieces.

    Good Luck,
    Glenn
    "Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil

  4. #4
    TXAG22 is offline CHR Member Visit my Photo Gallery
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    Is a new ECU required for this kind of swap? The mechanical parts I have a good understanding of but I’m not sure if I can just plug and play the harness with the old ECU.

  5. #5
    53 Chevy5's Avatar
    53 Chevy5 is offline CHR Member Visit my Photo Gallery
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    Yes, the fuel setting on a v6 will not feed a 454. There is going to be almost zero that you can use from The v6 and transmission that will work with a big block.
    glennsexton likes this.
    Seth

    God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing. C.S.Lewis

  6. #6
    TXAG22 is offline CHR Member Visit my Photo Gallery
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    Is there an aftermarket ECU y誕ll recommend or is my best bet pulling one from a 3500 with the same specs?

  7. #7
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    In my opinion, if you can find a 3500 that matches up to what you want to do?!?! Get it or as many of the parts you can from it.
    36 sedan likes this.

  8. #8
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    Quote Originally Posted by TXAG22 View Post
    I’m trying to swap a 454 big block into a 91 C1500 single cab which came stock with a v6 and a 5 speed manual.
    As pointed out on another thread about smog laws, you should first check to see legalities.

  9. #9
    TXAG22 is offline CHR Member Visit my Photo Gallery
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    Thanks for the help y’all this is all new to me! As for smog laws I’m in Texas and out here I’ve seen boosted LSAs in a 70s f100 just rollin so I think I’ll be okay.

  10. #10
    36 sedan's Avatar
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    Quote Originally Posted by TXAG22 View Post
    Thanks for the help y’all this is all new to me! As for smog laws I’m in Texas and out here I’ve seen boosted LSAs in a 70s f100 just rollin so I think I’ll be okay.
    Be careful, a 1970 vehicle comes under different smog laws (both State and Federal) than a 1991 does. Check before you leap...
    53 Chevy5 and rspears like this.

  11. #11
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    You might want to take a look at this, opening the fact sheet link towards the bottom - https://www.epa.gov/enforcement/engi...ing-fact-sheet
    36 sedan likes this.
    Roger
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  12. #12
    TXAG22 is offline CHR Member Visit my Photo Gallery
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    Alrighty it’s been a while since I started this! Coronavirus definitely slows everything down. I got to get some work in the truck today and have a harness question, it runs from the ECU to everything in the truck correct? Wondering because I found a 91 5.3 and I’m trying to part it out (a 454 just isn’t in the college kid budget lol)

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