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  1. #1

    Default LS6 cam/head swap onto LM7 ?

    Didn't know if anyone had done this on here.

    I've got an 06 Silverado 1500, Z71, w/5.3L. I also happen to own an 02 Z06 with LS6. The LS6 is getting the top end bumped up to help the car out since it is under powered

    So we're pulling the heads, cam, pushrods, timing chain, oil pump out of the LS6 for the upgrade. That leaves those parts sitting around looking for a new home. I've got a good book on Gen III engines that says I can bolt all this directly onto any other Gen III engine. They show the 6.0 in the build case but reference a LS6 cam, headers, tune on a 5.3 and get good numbers. Seems all I need to do is have the heads milled to keep compression correct and change pushrods. Should be good for at least 40-50ft/lbs if I add some 1 5/8" long tubes and a CAI.

    Anyone done one of these builds before?
    2006 Chevy Silverado, 5.3L, Z71, Extended Cab. Tow Mule.
    2002 Chevy Corvette Z06, 5.7L, Slightly Modded. Tow Payload.
    2005 Craftsman Riding Mower, 17hp, light mods.

  2. #2


    Was looking at heads for my bro's vette, and the guy at texas speed said either the 5.3 or 6.0 heads would fit on his ls6. So yeah, as long as you mill the heads to get proper compression, and get the right pushrods, you should be ok. Also note though, that if you mill the heads, you may have to mill the intake as well to get it to line up properly, since your ports will be "lower" and closer together after the head mill. Still would probably be worth doing, or on the other side you could keep the ls6 heads stock and lose a little hp from lower compression, yet still probably come out ahead.
    1986 Chevy G20 Tow Rig - 5.7 TBI conversion
    1978 Mustang II King Cobra Road Racer - Holley 650, MSD 6AL, 5 speed, 10 point Roll Cage, 9" posi, fuel cell, custom interior.

  3. #3


    not sure what it would take to do it, but if it can be done and you have the extra parts, upgrades are always good
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

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