Honda prelude si on 90 crx fh
 

I was wondering if a engine from an 86 prelude would fit on a 90 crx Fh, Would I need anything besides motor mounts or does it fit perfect with out any other parts, whoever has experience on the matter could you please let me know is there more to it,

I have a CRX with a single cam, engine is burn and my friend is throwing away his prelude 86, he will give me the engine and all othe parts necessary but will I need need extra part since it's a CRX, any knowledge will be appreciated thank you!! am a nood since all the cars I had before were already built and this is my first build!!!