Propeller shaft and rear axel

Hi all,
I carry on with my G22 and have more or less sorted out the rear bumper. Had the back of it sandblasted locally. A nice job and I have also used two layers of rust killer on the bare metal, two priming coat on top and finish now with glossy paint two layers and a coat layer coming up next week.
Howerver I need a bit of advice so any information most welcome:
In 1993 I had a new gearbox installed. The VIN number says I had A998 as from the attached photos. No change of propeller shaft...

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