Do one side at a time to keep the sub frame from moving much out of position.. Regarding pressing the bushings out, I couldn’t get my fat fingers into the area to thread the rod so I stacked washers and put a flat piece of aluminum on top. When I lifted the side it wouldn’t come out so I sprayed PB Blaster and lifted and lowered 3 times and the bushing popped out. Seating them was another matter. I could not use the tool to seat them so I coated the bushing with Silglide, a silicon paste, and tried to seat the bushing. It didn’t seat all the way but I pressed the bolt with a bottle jack and it threaded nicely. When I torque the bolt it seated acceptably but didn’t look bottomed out like the old one. After completing the job I am very happy with the results. When I changed the differential mount I had trouble getting a socket on it (I had to cut one down) because of the spare tire carrier interference. If anyone knows the right tool, please let us know.
If you have any more questions, please ask.

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Steve
1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si