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I have a 1984 that had the 231 Buick V6 with the Th200 3 speed. It has 270k miles and I am looking to swap the motor and trans. I live in CA and must meet smog requirements. Spoke with the Smog Ref and he told me what I needed to be smog legal, long story short, I pulled a 1991 GM 5.7l and the 700R4 trans out of a C1500, I took everything, computer, wire harness, radiator, Evap, etc... My question is...will this bolt in? I have new motor mounts no problem there, I am worried about the trans fitting in the tunnel and if the crossmember will work. (I am running single exhaust (has to have the Catalytic converter) so I don't think I need a double hump crossmember) and will the shift linkage work or do I need some kind of adaptors. Any insight is appreciated and resources to purchase needed components. Thanks Shack