Front subframe
 

Are they universal for all specs? - i assume they are other than the V8 .

Apart from the bushes, they are the same. Aluminium in the MG and rubber in the Rover.

There must be other differences because Rimmers quote 'From' chassis numbers - e.g. "From 5D345437" - which indicates earlier cars had different subframes? :shrug:

I think that is because very late front subframes were different from earlier ones .

They have some on clearance at the moment:-
https://rimmerbros.com/Item--i-GRID001545

My chassis number is earlier than both of those so they could be completely different to mine. Rimmers have deleted the ones they don't have so I can't even tell what the correct p/n is.