The LSE had it first from 1992.
SE as std for 1993 model year and as an option for lower trim level.
However as with everything there are exceptions to the rule so best ask the question of the seller.
Well in my experience I have found F-F to be one of the most knowledgeable and helpful chaps on the two forums I moderate.
I hope you will find the info on here useful too.
Well at least you got sorted, that's the main thing.
Things is that should someone else buy steps from JSG then at least your experience is here for them to draw from.
The slot is for the oil pump drive, it still has a skew gear drive from the cam to run the distributor. This is where it can get difficult as during a rebuild the pump drive can be misaligned to the cam gear which can result in mis-timing if you haven't encountered the problem before.
It's quite feasible for the axle tube to be bent.
We had one on here (I think) years ago with tyre wear only on the inside edges.
Turned out the rear axle was bent.
We had a Disco in the club with a bent front stub which caused similar symptoms.
That's because the key is usually associated with the shaft. P/N 554880.
I've got at least one Pre '86 PAS pump somewhere.
If I get time and can find them, I'll check how many pulleys they have.
No the grumpy old git that moderates the section got to the computer after you did, hence the anomaly (moderator approval).
I've since lifted that restriction so it won't be an issue again...
...unless someone starts playing up of course.