It is a PITA but not too bad. You can either carefully cut them out (what I did) or have them pressed out. Although I did poly control and stock rubber lower shock mounts. If you live in salty road area use a lot of PB BLaster especially on the bolts you can't get to both ends-like inner front lower control arms. Ask me how I know!
I need to do the poly trailing arms this weekend- not looking foward to that, I've already tried to get the attaching bolts out and I know I'm almost breaking them. Lots of PB Blaster!!