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Thread: engine swap

  1. #1

    Default engine swap

    i have a 2004 silverado swb reg cab 4.3 5-speed manual looking to swap for any v8 i am willing to swap for ay v8 ive heard the 5.7 vortec was a good fit i would like to know how hard this would be planning on keeping the truck and eventually making a show truck so no resale in the future

  2. #2


    I've got a 5.3L in my '01 silverado. I like it alot. Wish it was supercharged though. But same with any engine really. Good luck
    Mike - OREGON

    2001 chevy silverado 4x4. 5.3L, 6 inch Fabtech lift, 35" Toyo MT's, 17" Weld Racing wheels, arma coating on rocker panels. No exhaust after cat. Pioneer stereo

  3. #3


    It's kind of a pain to get a 5.7L in an '04 as opposed to a 5.3. If you've got coil-on-plug ignition, you'll have to run some wiring to get the 5.7's distributor to work(which is better and cheaper anyway). You'll also have to have the PCM programmed for the 5.7's fuel injection setup, because the old Vortec and the setup on the 5.3 are rather different and the parts aren't interchangeable.
    But, there are a great many more performance upgrades for the 5.7, so if you can do it, I highly recommend it.

  4. #4

    Post engine swap

    I would drop a 6.0 (LQ4 or LQ9). It would bolt in, if you can find a salvage yard e/cab or c/cab you can get all your parts (wiring harness, ecm etc etc)

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