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454 swap

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KRAZIE87K5, Mar 19, 2001.

  1. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    You folks here are gonna get to love me as I bring the ol' K5 to life over the next month or so...

    I am installing a 454 rectangle port block into my Blazer. New (stock) motor mounts (for the 350cid) have been installed at their factory locations. Will I have to relocate them when installing the 454? Has anyone here ever tried this? If (and I'm sure I do) have to move them, where do I move them to for best placement of the motor/trans/transfer case? All this 4x4 crap is new to me... I am used to OLD fast street cars... no xfer cases there!

    I just got the motor together last night, and I'm itching to get it in the truck! (Hence question #2) Can I install the motor/trans/transfer case as one unit, or should I assemble all the parts to the engine once its installled? Here is why I would like to install it all at once... The truck already has a 6" suspension lift installed, and my trans jack can't lift high enough to get the NP205 in place. And that SOB is heavy! I think it actually weighs more than the TH350 mated to it! Sorry to keep babbling... PLEASE HELP THE ROOKIE 4x4 GUY!!! Thanks to all!
     
  2. Shawn

    Shawn 1/2 ton status Premium Member Author

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    The motor mounts will align up perfect. I would suggest getting the Energy motor mounts for the SBC though. These are strong enough for any modified BBC. Stock 3/4 and 1 ton mounts for BBC won't work (I found this out the hardway) so Energy is the only way to go. I wouldn't suggest trying to install the engine/trans/tcase as 1 unit unless you remove the grille and radiator support. Separating the pieces and airing down your tires sounds easier to me.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  3. KRAZIE87K5

    KRAZIE87K5 1/2 ton status

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    The mounts your are suggesting are on this page:
    http://www.energysuspension.com/prod1.html
    correct? I see the "clam shell" type, is that what you used? Or did you have the other type displayed on this page? The mounts I have new, but the motor will have ~500HP/500ft/lbs torque. So I don't really want to take any chances...
     
  4. Shawn

    Shawn 1/2 ton status Premium Member Author

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    Correct, you want to use the clam shell type like this:
    [​IMG]
    It only comes with the poly part and it re-uses the stock top and bottom metal pieces so don't throw away your old motor mounts.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     

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