The best way I found to get them out was to cut them in to sections about a foot long and remove them in peices. There is a few tricky spot welds to get at like from the bottom of the a pillar and all the ones sandwiched between panels. I didn't brace the car at all because I have 2x3 subframe connectors running the length of the car and the car is stripped down to nothing. I made marks in a few places before I started and with them completely removed nothing has shifted yet.
