I need to replace the seals and bearings in the front end of my 91. ive seen the rebuild kit but how hard is it to do? i work in a small garage and have dealt with u joints and ball joints and stuff. but never done a kingpin style set-up. ive done the rear seals and that wasnt too bad. just wonderiung about the front because the wheel bearings are starting to get a little bit loose. also the birfield seals are leaking and i have already replaced one by cutting a slit in it and placing the slit on top. worked for a little while and then eventually gave out.