Cutting strut rod bushings for correct geometry?

OK so I decided not to cut those old bushings and bought a set of the Moog 2-piece for a 1970 A-body and they fit great. Only thing is, they come without a sleeve and the directions specify to torque the locknut to 40-60 ft-lbs. I barely got to 20 and the bushings looked really squished, I was afraid of splitting them if I went any farther. What is the proper technique for this??