The box is a pretty straight forward rebuild. Be sure to use the new "unitized" or one piece bearings. The bearings in the box are originally individual balls. You can also use new individual balls but it makes it a little trickier to do. You have to goop up the bearings so they stay in place. The new sector shaft bushings MUST be reamed to fit to the new sector shaft. This is the only "hitch" in the process. I have a lot of reamers laying about. The reamer for the sector shaft can be cost prohibitive. You might be able to find a machine shop that will ream them for you. You will need new gasket and bearings. You may want to pick up a shim assortment. The preload will be set on the bench using shims.