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    1983 C10 305 to 454 Swap

    I am in the process of installing a 454 & TH400 out of a 1979 C2500 LWB GMC truck into my 1983 C10 SWB that had a 305 with a TH350 (Motor & Trans were gone when I bought the truck). After installing the motor & transmission the transmission crossmember doesn't line up. I do know the TH400 is 2...

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