Conversions & Swaps LSX Engines in Non-LSX Vehicles
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1999 tahoe possible?

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Old Jun 4, 2006 | 12:24 AM
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Default 1999 tahoe possible?

Hey i have a 1999 tahoe with the 5.7 vortec in it, does anyone know if the LS1 will bolt in it as far as bolting to the trans., or if it has been done thanks.
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Old Jun 4, 2006 | 02:41 AM
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It will bolt to the trans but it needs a little more mods to the engine mounts
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Old Jun 4, 2006 | 11:35 AM
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edit: did some research and realized that a Vortec 350 is a SBC.
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Old Jun 4, 2006 | 04:41 PM
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so does anyone make an engine mount kit??
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Old Jun 4, 2006 | 06:00 PM
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i'm sure the trans-dapt motor plates would work. You'd just use the plates between your LSX engine and the original SBC mounts. I believe the trans will bolt right up.
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Old Jun 4, 2006 | 06:14 PM
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Yeah, your trans may have one bellhousing bolt that isn't used, but it should mate right up. Should be an easy swap, hardest part being wiring, but even that isn't particularly challenging if you're handy. No more difficult then installing a remote start.
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Old Jun 4, 2006 | 10:23 PM
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thats awesome news preciate it guys!!
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Old Jun 4, 2006 | 10:54 PM
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There are issues with the torque converter because the crank offset on an SBC is different than on a GenIII. I do believe there are companies that have spacers or torque converters made just for this application.

Andrew
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Old Jun 5, 2006 | 11:47 AM
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Your best bet is to drop in the correct transmission for the ls1. The bellhousing, input shaft, offset ect will be different on the sbc 4L60
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Old Jun 5, 2006 | 08:49 PM
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but will i still keep the 4wd with a transmission from an ls1?
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Old Jun 5, 2006 | 09:48 PM
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http://forum.ls1truck.com/
ls1truck do some searching here.
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