I did my 96 not long ago. It was a pain. I didn't try to cut any corners and opened up the area as far as possible, removed the battery, battery tray and A/C line hold downs. Unbolted the motor mount from the frame (bottom), easier to remove the whole mount than the cross bolt IMO. I used a block of wood on the pan rim (bolt tops) and used a jack to jack the passengers side as high as practical.
I got lucky, two of the bolt stubs were fairly loose in the threads after applying penetrating oil. The third I let soak overnight. All three stubs came out without much issue.
I Had a close quarter angle drill. My son showed up with some short Cobalt drill bits. Cobalt drill bits make drilling hardened bolts a lot easier.
A couple of tips, you may be able to rent an angle drill. Makita right angle drill (DA3010F) is the narrowest available (we found). Makita was the only one we found that was narrow enough to fit. Be careful with Easy Outs, don't try too much pressure, even the good ones can snap off and make the job a whole lot harder.
A million dollar trick for rusted in bolts or brake lines. Heat, then quench with spray oil, repeat half a dozen times. Expand and contract to help break the bond and at the same time help the oil penetrate as far down the threads as possible. It doesn't take all that much heat, a propane torch or even a heat gun will do it.