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454 in my 77 k-5

Discussion in 'The Garage' started by Danny Joe, Jul 20, 2005.

  1. Danny Joe

    Danny Joe 1/2 ton status

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    Does anyone know how much trouble would it be to put a 454 into my 77 k-5 blazer. would it bolt right up to my automatic turbo 350 tranny. are the motor mounts the same. I just dont know. Any info would really help. Thanks, Danny Joe. My email is ltdanjg69@aol.com
     
  2. SUBFAN

    SUBFAN 1/2 ton status

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    It is a piece of cake....Keep on the lookout for a beefier trans and possibly a bigger radiater though....

    The exhaust will probably need some reworking to hook up.

    Nothing to major, drop it in and grin....
     
  3. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    It should work. I think you will use the BBC motor mounts.
    I have a 454 for sale. PM me if your interested. :thumb:
     
  4. Mad-Dog

    Mad-Dog 1/2 ton status

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    I just did one not too long ago and ya gotta move the frame mounts, no bigee the holes are already there. :bow:
    pulled a 305 and stuck a 396 in the hole....
     
  5. shane74

    shane74 1/2 ton status

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    Everything is a bolt in swap. You will want to consider running a 4 core radiator. If you do, do yourself a favor and use either the factory one with a new top plate, or spend the $$ on a thick aluminum one. The cheap aftermarket ones that drop into the stock location of the 3 core really don't work very well.

    Since you are running a 350, the motor mounts are the same as well as the location of them. You won't have to move anything.

    Also, keep an eye on your tranny. There are a lot of rigs that run the 454/TH350 combo, but most of the TH350's have been modified to handle the torque of a 454.

    If your rig still has the 1/2 ton axles in it, go easy on the skinny pedal. Oterwise, you'll get to see the insides of your axles and you won't even have to pull the diff covers off. :D
     
  6. greg mgm

    greg mgm 1/2 ton status

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    I swapped the 350 from my 78 truck, and went with a 454. Whatever trouble you deal with, just do the swap!! You will love the big block power. Also, I needed a set of brackets for the accessories, maybe they'll come with your engine?? For sure, upgrade the radiator.
     
  7. Danny Joe

    Danny Joe 1/2 ton status

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    Big for sale

    Just wondering whats been done to it and how much? Thanks, Danny Joe.
     
  8. MEGALADON

    MEGALADON 1/2 ton status

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    Very easy swap, don't have to move motor mounts :bow: bolts right in..
     
  9. Danny Joe

    Danny Joe 1/2 ton status

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    Thanks, Any future plans for your rig.
     
  10. MEGALADON

    MEGALADON 1/2 ton status

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    I got new wheels, my 454 is in, and I'm in the middle of a overdrive swap :D

    [​IMG]
    [​IMG]

    Good luck with your swap :waytogo:
     
  11. JeffHK5

    JeffHK5 1/2 ton status

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    What type headers? Do they fit good? By that I mean will the hit stuff under offroad conditions.

    I know It's not been offroad yet but IYO?


    O' sorry for the hi-jack, I just did the same swap and can't find a header thats worth a s@#%!

    Thanks Jeff
     
  12. MEGALADON

    MEGALADON 1/2 ton status

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    I have cheap $125.00 hooker headers, and they really suck, they hit the leaf springs
    and they hit the driveshaft :mad: If you look at the last pic, you can see how the driveshaft has a ring from rubbing the header.

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
  13. JeffHK5

    JeffHK5 1/2 ton status

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    They should let you put those pics. on the side of the header box so people don't waste there time!

    And it's not just Hooker, Hedmen and Flow-Tech fit just as bad! :mad:

    I think I'm going to try blockhugger headers from Summit as they are cheap and if they don't work I'm only out 129.99.

    Might go for some stacks out the hood , like a pulling truck :haha:

    If you find a set that works PLEAESE let me know.

    Thanks Jeff
     

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