I thought that air lockers were ok but not detroit lockers 
you don't really want a detroit in any front end. if you break an axle shaft the resulting backlash tends to blow up the guts inside the locker.
a lot of guys use lockrites and aussie lockers in the front, if you break a shaft it usually just shears the pins off that can be replaced for $10 or so. ARBs and toyota electrics don't have the same problems as detroits, from all i've heard
