Conversions & Swaps LSX Engines in Non-LSX Vehicles
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new to LS1 tech need some help lm7 to th400

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Old 04-01-2013 | 07:39 PM
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Default new to LS1 tech need some help lm7 to th400

Hey guys need some help im new to LS1 tech and im sure this has been covered a million times but im trying to mount my 99 LM7 to a turbo 400 im swapping this in to my 86 chevy truck. i need some links to a adapter or whatever i need to join the too any help would be greatly appreciated.
Old 04-01-2013 | 08:39 PM
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Originally Posted by jtroam
Hey guys need some help im new to LS1 tech and im sure this has been covered a million times but im trying to mount my 99 LM7 to a turbo 400 im swapping this in to my 86 chevy truck. i need some links to a adapter or whatever i need to join the too any help would be greatly appreciated.
400 will bolt up. You'll need a flexplate for the 400. Look on summit racing for a flex plate.
Old 04-01-2013 | 09:01 PM
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i found it thanks! does anyone know much about the schwankee wiring harness and PCM?
i dont have a harness or PCM
Old 04-02-2013 | 06:38 AM
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I advice getting a harness from bp automotive hes a sponsor on here. very good quality. as for the pcm decide whether you are going dbc or dbw.
Old 04-02-2013 | 05:10 PM
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you can get a flywheel to adapt it or you can get a custom converter to bolt up to the lm7 flywheel like i did for my 700r4 precision is who did mine



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