The brakes are wierd on a normal 924 as it is an X-type system
The wheels are 4 lug
The seats usually are not that hot either (even on the special Martini racing edition)
What you can get is a tachometer and rear torsion bars (might not be better than a t3 wagon though at 23mm?).
Pretty mucha waste unless it is free I think. Too much Audi/VW and not enough Porsche!