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Thread: 02 4.3 to 5.3 conversion?

  1. #1
    Join Date
    Nov 2003
    Posts
    3
    What all is needed to do this swap? has anyone done this swap? I have 5.3 motor oil pan to throttle body, ignition coils, but no engine harness. Can i use the one from my 4.3 with some conversion or do i need an all new one? also what about the computer, the electronics are my main concern then will come the accessories.

  2. #2
    Join Date
    Mar 2003
    Location
    Florida
    Posts
    1,208
    hey whats up, im lightning killer over on fsc just so you know, theres some good info over here. allen(farmtruc) has modified a 99+ truck harness for his 94 truck w/ an ls1, he wrote some killer swap tips and info pages, just look in the reference section. i went with a painless harness($500) and sold my stocker i had on my LS1/t56.

    also, Oscar over at Dynatech(he is a sponsor here) is very helpful, i believe his name is "LS1pro" on ebay, but he can take your 4.3 harness and make a plug and play harness for you i would assume, for less money than the complete harnesses, but dont quote me on that, you'd have to ask him. then theres Speartech, S&P, and LHT....but with those be prepared to spend a little money...to the tune of $700+ for a complete harness you may not even need.

    <--Brandon
    Hugger Orange 99 SS Hardtop #756
    485rwhp/440rwtq SAE

    http://i83.photobucket.com/albums/j301/slmdls1/Signatures/hugger-prostar-sig.jpg

  3. #3
    Join Date
    Oct 2003
    Location
    Whittier California
    Posts
    63
    Hey guys. Dont forget, LS1TRUCK members get 10% off at dynatech on their wiring

  4. #4
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    w3rd up yo, hahah

    that&#39;s great

  5. #5
    Join Date
    Mar 2003
    Location
    Florida
    Posts
    1,208
    see i told you he could help
    Hugger Orange 99 SS Hardtop #756
    485rwhp/440rwtq SAE

    http://i83.photobucket.com/albums/j301/slmdls1/Signatures/hugger-prostar-sig.jpg

  6. #6
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    Originally posted by Sleeper@Nov 23 2003, 10:06 PM
    see i told you he could help
    that&#39;s too funny, hahha.

    i can post more info if you need it, just need to go thru my list of junk and organize it,
    make a list of everything you need, that helps alot. the mounts, wiring and shaft will be your biggest concern.
    Your stock gauges will work.

    post some more specific questions and i&#39;ll be glad to answer them,

    did the write up help?

    allen

  7. #7
    Join Date
    May 2003
    Posts
    57
    Originally posted by Dynatech@Nov 23 2003, 03:52 PM
    Hey guys. Dont forget, LS1TRUCK members get 10% off at dynatech on their wiring
    what do I get for putting dynatech in a book ?

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