Suspension interchangability....???

[Jason someone]

wondering if teh suspension between the NON quattro coupe gt and 4000 are 
interchangeable in teh rear with that of teh later 88-91 audi 80 and 90 non 
quattro/quattro??

I need new suspension and have gotten a good price on some struts for teh 
80/90's but wondering if they will work on my car?....I also have the 80/90 
rear disc set up on my coupe gt already....

thanks