As per the previous comments I think it has a lot to do who will be doing the inspection and whether you are city or country mouse.
I did the same thing when I got my truck and just wanted to get it certified and road worthy before deciding what I was going to do with him.
I needed new brake cylinders and king pins for mine to pass but, seat belts, extra turn indicators and pretty anything not original was exempt.
Emissions testing was exempt as were side mirrors.
As I said, it really depends on where you are getting it certified regardless of the MOT regs. Sooner rather than later would be good advice.
