NEED HELP!!? My 1986 GMC K2500 Sierra Classic came with automatic locking hubs and I hate automatic locking hubs because they are unreliable. Is it possible to remove the automatic hubs and replace them with manual locking hubs, how much work is involved in replacing auto-hubs with manual hubs(what steps do you take in replacing auto-hubs with manual hubs?), and how much would it ruffly cost to have a mechanic do the job????? ANY INFO ON THIS SUBJECT WOULD BE APPRICIATED!!