A 1986 four-barrel intake can generally be adapted to fit a 5.7 TPI (Tuneflow Port Injection) 350 engine, but it may require modifications. The TPI engine has specific mounting and port configurations that differ from the traditional four-barrel setups. Additionally, you'll need to consider compatibility with the fuel delivery system, as the TPI relies on a multi-port injection setup rather than a carbureted system. Always check for compatibility with your specific engine and application before proceeding.
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