interchangeable parts

I have a 1990 Ponitiac Grand Prix STE 4 door which was totaled out.
Right front..drove away from the accident... sitting in my garage for 4 years....was told that everthing moved over about an inch
No Leaks... Starts...can't let it go..
beautiful car , Lots of memories....Totaled 3 weeks after my daughter passed away from Transplant #2 complications.
We traveled back and forth to the hospital 3 hours away...
lots of good conversations...
anyways...
I have a 1991 Grand Prix SE 4 door
Hit Drivers side by back door ...is drivable
Are any of parts interchangeable ?

Also Drove 91 Grand Prix from storage....
now it won't start....turns over...Replaced battery
Fuel Problems of some sort... any suggestions?
Is it true that the fuel pump is located in thr tank ?

Not sure bout the parts, but for the 91 that wont start I'd try a new fuel filter before anything else.

I would however think that all the parts should be swapable if the cars have the same motor. 3.1 ???

try www.clubgp.com for answers on interchanging parts between the 2 cars