When my starters are going out on the 3.2's that is what always happens to me. Do the easy stuff first, like cables and such, but prepare for a starter repacement.

1987 trooper LS.'94 3.2, SAS,35's , lots of dents and rust. Now, improved, with more dents.
1995 trooper LS. Wife won't let me improve this one.
1996 trooper. I'll need something to modify when the '87 finally rusts away.