I would say its the bushing also but from my past exp you either have to cut the bolt and just replace it with another bolt but put the nut on top so next time you can just undo the bolt. I just do not personally like messing with the sub frame bolts just in case they where to strip or get damaged in any way. But again just my two sense.
98 eo SVT Blk & MNB 2.5L built trans # 692 05/02/97(stilov's 3L Turbo)
2000 oval-port 3L Silfro & P-Tan #1337(sold 12-28-12)
2000 3L Blk & P-Tan #634(totaled)
1999 Blk & P-Tan #0059(sold)
And about 13 more :-/