I have a question regarding the interchangeability of the bumper covers for the 700/900/S90 with those for the 850/S/V70. I've seen the newer cars' parts on the older cars, and I'm wondering how difficult it is to make them fit. I ask because I found a junked V70 XC with factory dual exhaust cutouts, and I'm getting ready to put a dual 3" cat-back exhaust on my 1990 765 T/I, and I'd rather have a clean symmetrical factory look over cutting a mirrored-symmetrical (to the other side) semicircle in my current bumper cover.

While we're on the subject, how interchangeable are the wagons' liftgates and taillights for the same models?
Thanks!