I would not undo the trans from the engine without the trans supported by the transmission jack. but first the front jack stands should be on the suspension pivots at the front crossmember, you won't have enough room for you and the tranny jack with stands on the frame rails. undo the slave feed line at the coupling on the rear of the crossmember, one way or another it needs to be seperated and I'd replace the rubber hose with flex steel line as a priority, also carefully inspect the guibo and the trans support bushing, don't forget the speedo cable and the centerlink is best moved out of the way.
PS - rear main seal engine