I bet this probably has been covered before, and I just want to be safe, I need to jack my car up on all fours using jackstands, Where is the best place to position my floor jack so I can leave the donuts free to put the stands there.

if your longitudinals are intact, a jack peg in the jack receiver is the hot setup.

lacking that, use some firm padding (2x4...) and jack the tranny near the differential carrier if possible and use a 2x10 or something across both torsion baar carriers in the front.