Interesting...did not know this.

So, the 928 seats/rails bolted right in, no mods?

 

I'll ask my dad about the rails as he put the seats in the car when he owned it but the spacing for the rails is the same. I have a bare seat frame from a 944 seat and it is a 928 part number. So worst case is you reuse your rails. The major difference between the seats is the extra padding, otherwise they look the same to me.