Someone plz HELP!!

I just got given to me an 85 prelude... it needs work. Its hard to find parts for this great car, and I was wondering if parts from other preludes or any other hondas for that matter, interchange to work with the 85 prelude 1.8. If anyone can help me with that it would be great. Also if there's any ideasbotu what i should do to this car to makeit better let me know.