Hi Graham,
are you refering to the four bolts from the rear of the brake backplate? that hold the stub axle onto the rear axle? as these are not 27mm and should be torqued to 66Nm the 235Nm I refered to before was for the large hub nut in the centre of the brake drum that when torquing it up you should keep turning the wheel to ensure the bearing is seated correctly
nigel, July 2009