same engine only more powerful, not sure if its the same ECU,, 172 in the FL1, 180 and 190 in the MG. Drop in with the Rover boys at MG-Rover.org they will know on the spot. Rover 75 is the pipe and slippers brigade, they have a sub-forum for the MG ZT. Nice motor, Clarkson raved about the MG ZT V8
not sure about the auto box JF, surely the engine would mate to a variety of boxes.
Great MG forum, if they can't tell you the answer to a tech query, it's because the problem never existed
The V6 engine issues in the FL would be the same for the Rover 75/ZT
Reading the OP again, is it just the VIS that needs replaced?
They are around £500 for the intake system, two types were made.
I have an article from Enjoying MG, mar 06, on the VIS. Explains about the cleaning issues, Rover boys used a V8 flame trap as a oil separator in the breather line.