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I am new to this forum thing and wanted to get some info regarding my swap. I purchased a used d15b7 to replace my old d15b7. I have currently an automatic transmission and I believe the new(Used) engine is meant for a standard transmission. My question is, is there going to be any compatibility issues? If it's the same type of motor will I need a new pcm? Please let me know asap thanx. And just a heads up my old motor needed to be replaced. Had been rebuilt already and it ran 320,xxx miles. It was a trooper

 
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the only thing you are going to need to do is swap your old flywheel to the new engine, everything else should be the exact same.