With a T16 engined car, don't be surprised to find that at some stage you'll need a new high torque starter motor, as most of the originals weren't up to the job, and new gaskets for the sump and cam covers as the old ones go brittle and leak.
And you'll need an injection/ignition specialist if ever you fancy plugging in the diagnostic socket, 'cos even the old Rover dealers don't carry the right equipment to get the full readout. And then there's the 'wiring diagrams'...!
Good luck.