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Anybody out there who knows 4.3's well enuf to advise me ? Ive got a bone-stock tbi 4.3 that I would like to upgrade with factory parts. I'm thinking that newer heads and intake system would probably make a huge difference in performance. What years should I be looking at? What problems might I encounter? Can I use my computer or would I have to get the one out of the vehicle that the other parts come from. Thanks, in advance, for any advise you can offer.
 
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