Thread: 454 swap help

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Originally Posted by TXAG22

I’m trying to swap a 454 big block into a 91 C1500 single cab which came stock with a v6 and a 5 speed manual.

As pointed out on another thread about smog laws, you should first check to see legalities.

Thanks for the help y’all this is all new to me! As for smog laws I’m in Texas and out here I’ve seen boosted LSAs in a 70s f100 just rollin so I think I’ll be okay.

Originally Posted by TXAG22

Thanks for the help y’all this is all new to me! As for smog laws I’m in Texas and out here I’ve seen boosted LSAs in a 70s f100 just rollin so I think I’ll be okay.

Be careful, a 1970 vehicle comes under different smog laws (both State and Federal) than a 1991 does. Check before you leap...