Spicer trac lok

Any body running a Spicer trac lock in a daily driver? Looking at getting one for my 98 1500 4wd with 9 1/4 rear. Are these the ones the factory used? Basically my daily driver work truck so don't wanna go the locker route. Especially when I can get this through work for about $290, then another $75 for bearing and seal kit. Live in the boondocks where there's alto of mud roads and the snow gets deep during winter.