Eeeeh, this is a Jeep TJ forum. It was built between 1997 and 2006. Just to make sure, you have a 1987 Jeep? Those were teh CJ years. Someone may know something about them, and I personally can’t see why replacing them would be difficult. Just spray some Kroil on them, give them some time to break free (if they are stuck), remove them, go buy some grade 8 replacements and you should be good to go.