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    12v swapping 88 k3500 gmt400

    I have a 88 k3500 dually with a 454 with a 93 chevy nv4500. Truck originally had a 350 tbi and turbo 400. Blown a few motors since then now going the 12 valve route I'm wanting to keep my tranny and transfer case 241c and make it mate to a 96 12 valve. If anyone have any advice; parts; parts...
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