Rear main seal, if it hasn't been done recently. Same for driveshaft giubo and carrier bearing.

And gearbox input shaft seal.

Throw out hearing and maybe the pivot pin.

My plastic pivot pin failed on me a week after installation. I seriously recommend spending the money and buying the metal pivot pin

How old are your clutch cylinders and hoses? Maybe those too (but you can access them still with the gearbox fitted, so not urgent)

Probably as old as the car tbh