280zx r200 swap to 260 Z R200

Hello,

I searched the forum and get a bit confused.

I have a 260Z with R200 (3.9) diff. but this has too much play in the gear.

I can get a 280ZX diff(1981) , but the driveshafts are different.

Do I have to swap the driveshaft flanges from my old diff ?

Thanks for you help

Rainer