PSC steering box leak

Last trip i started bleeding fluid from the top of the PSC steering box at full turn. Guessing I blew the gasket on top of the steering box. Is this an easy fix, just pull the few bolts and replace the gasket or am I gonna loose bearings and crap all over the floor when I take it apart? Wondering if I should just throw in the spare orbital from the CJ and make it full hydraulic.