Looking at purchasing a 1990 XJS Convertible with 66k - looks to be in good shape and I will book an inspection using Carchex tomorrow. Also planning on compression checking the engine.

Any idea where I can get hold of a service manual, which shows me the intervals and tasks? Interested to learn when the timing belt is due for change etc.

Anything else I need to look out for?

How difficult is it to add rear seats into the vehicle? Believe it currently has not seats and storage box instead.

Thanks!