Thread: 3.1L to 3.8L or 3.5L engine swap

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  1. #1 3.1L to 3.8L or 3.5L engine swap 
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    Have 2003 Grand Prix needs new motor , is J code 3.1L
    Can this be swapped with a 3.8L or 3.5L ??, use whole cradle with trans ??
    And engine computer ??
    How about wires ??
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  2. #2 Re: 3.1L to 3.8L or 3.5L engine swap 
    GrandPrix Junkie dpzelenak's Avatar
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    do the 3.5, go to Milzy Motorsports or give them a call. they a a whole kit that swaps the 3100 to the 3500, wiring harness, mounts everything you need

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