how to b18b in 89 pralude si

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how to b18b in 89 prelude si

how hard is it to put b18b 1n 89 prelude si aws. thanks guys its got b20 in it now factory
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Not the same block, will not work without heavy modification. The only thing swappable between the B20 in your Prelude and a newer Bseries is the Valve cover, although I have heard rumors of the cams being interchangable.