From my 1997 30th Anniversary SS, I have neither the R7T nor the WU8 . . .
This is what mine has:
I have R7A and WU9 . . . ?
But from what I have found and noted . .
The R7T was the RPO code for the SS package in 1997 . . .
The R7A was a SLP option code . .
The WU8 was linked to the SS package . . . .
The WU9 was linked to the 30th Anniversary SS package . .