Prace bets now!
NM falls nicely (for the ones I've looked at) with the standard rated torque outputs of the engines. I.e. 'this is a 150 lb ft box to go with this 150 lb ft engine'. Then we only have the normal overengineering factor to go by.
Lb Ft, although nice 'F28 can easily handle up to 280 lb ft' seems less likely for Vaux to do this. Most F28's seem to be feeling the strain of the standard engine after the 10 years or so of use.
Anyone got a difinitive answer?