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Thread: LS1 in a '81 GMC

  1. #1
    Join Date
    Dec 2003
    Posts
    4
    I'm looking into swapping my LS1 and auto tranny from my wrecked camaro into my '81 GMC step side. Never done an engine swap before and i was wonder how difficult it would be and what kind of fabrications i would need to do to complete everything. Any advice would be greatly appreciated. Thanks.

  2. #2
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Welcome! I can help you out. I used some adapter plates to mate the engine mounts. The rest is not to bad. You will need to install an electric fuel pump and do some wireing. I used the electric cooling fand from the camaro to cool the radiator. I had to modify the passenger side engine mounts and exhaust manafold but if you don't want AC then the swap is quite a bit easier. This how mine went. http://forum.ls1truck.com/index.php?showtopic=289
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  3. #3
    Join Date
    Mar 2003
    Location
    Florida
    Posts
    1,208
    can he use the S&P Plates for the mounts?
    Hugger Orange 99 SS Hardtop #756
    485rwhp/440rwtq SAE

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

  4. #4
    Join Date
    Oct 2003
    Location
    Whittier California
    Posts
    63
    Hey dont forget to see me for your wiring

  5. #5
    Join Date
    Dec 2003
    Posts
    4
    i have the pcm from the camaro, what kind of wiring would i need?

  6. #6
    Join Date
    Oct 2003
    Location
    Whittier California
    Posts
    63
    We can do this 2 ways. #1 I can set you up with a 4 wire hook up (power, ignition, fuel pump and starter) the rest of the wiring in the truck will be finished by you. #2 you can send me the firewall bulkhead connector from the 81, i will graft this portion of the truck wiring to the camaro harness (charging system, gauges, A/C, ignition and starter will be wired)

    Price for #1 $300
    Includes:
    Fan relays
    A/C request
    Rear O2 simulators


    Price for #2 $450
    Includes:
    Same as above + grafting

  7. #7
    Join Date
    Dec 2003
    Posts
    4
    thanks for the info dynatech. I'll definately give you a buzz when i'm ready to swap everything in.

  8. #8
    Join Date
    Jul 2003
    Posts
    74
    hey david, was there any engine damage in the wreck? you really did smack the hell out of that tree.

    and dynatech...i still need a tracking number. i'm back in pensacola and im ready to get the truck running.

  9. #9
    Join Date
    Mar 2003
    Location
    Florida
    Posts
    1,208
    Originally posted by RedSpeck_09@Dec 13 2003, 10:14 PM
    i'm back in pensacola and im ready to get the truck running.
    pppppffffftttttttt. ha ah ah ah aha hahahaa ha ah ahahahahah


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

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

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