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It's a pretty common mod to install a 454 throttle body and injectors on a 350 motor that is built up a little. The intake needs to be bored a little bigger for the 454 throttle body. Another good mod is L98 heads to replace the boat anchors that came factory. They L98's run about $200 for a set.

Cam, heads, and new throttle body will really wake those motors up.
 
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