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    gm tbi on 3.7

    i know 3.7 merc. its all good my question is how do i make a 4.3 tbi on my 3.7 i have running 1990 gm van tbi now the only thing good on truck is the tbi so how do i get around the o2 vss and esc . i have aftermarket ignition now . so any thoughts out there, be nice
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