The method of turning it a certain amount and then backing off is how you would do the older foxbodies that have the bearings in the brake rotor. They also use a cotter pin to keep the nut from backing out.
The 94-04 cars have a bearing hub that bolts to the spindle, and that ******* is tight. The 250+ ft/lbs. is correct. I think your supposed to use a new retaining nut.
90 LX, Previous 4 cyl.
408W In the Works
TW FAC's, Jay Allen cam, Super Victor
2001 V6 5 Speed Daily Driver
Windstar Intake, Dual Exhuast, CAI, Headers
Best ET: 15.44@91 mph (on 18's)