Ok i currently have an 85 1.5 CRX, here's my plan:

I found an 86 si model crx with rear damage (No too bad) it runs great, i was curious if i could swap the parts off my 85 to fix the rear of the 86? Would it be worth it? Need advice thanks,

Close_Call

How many miles does the 86 Have on it compared to your 85? If it has less miles and runs better then by all means use the parts off of your 85. In the end.... you can use the parts off of your 85 to use on the 86(ie: Guage cluster, seats, etc). Have fun with the whole project. :D