Sounds like you are doing the same thing I am.

My parts come today. I'm replacing the B3 reverse clutch pack, front pump seal, rear seal, k1 spring kit, shifter plastic knuckles, and the B2 piston while the transmission is out...BUT
I was underneath the car last night the survey the situation and PB blaster some rusty bolts and nuts. And YES ...those top 2-3 tranny bolts seems impossible to get at. So ...let me get this straight. I got a tranny jack (Harbor Freight). After disconnecting all the stuff (cooling lines, wiring, dipstick, ect), I will support the transmission with the jack and take off the transmission mount and off the flex plate. When I lower the jack holding up the tranny...will it drop at an angle (some say 6-8 inches) so I can get about 5 feet of extensions to get at those top bolts? I some say to jack the engine too to tilt it. Does this sound right? I have an electric 1/2" impact wrench I can use to torque those suckers off. When I'm underneath the car, head pointed to the rear, to the right of the transmission are the 2 catalytic pipes...do I need to remove these still after the tranny is tilted? I really don't want the take off the muffler/cat but doesn't seem to be enough space to get at those top (even side bolts passenger side).
I'll be lurking around until I make the plunge this weekend