Hi Bob,

I am pretty sure, that there was no swap, because I own the car now for over 29 years. And I think, it is a 10 bolt cover, but I just asked my mechanic for a picture.

It's a BOP axle (I did not know what that means, but now I think it's Bolt On Part). I already removed the rest of the shaft and counted the splines. There are 28.

... my mechanic was fast: It's 10 bolts and I have the picture attached.

Cheers,

Markus