Should be 4 or 5 sheet metal screws holding it to the bottom of the dash. Might possibly be another brace, but once you loosen it from the dash you will know. Still the usual twisting and reaching but the ac unit will hang down.
It's easier to do as much as you can from the passenger side, even for the screws on the driver's side. I don't know why, but mine was a royal PITA on the driver's side. Be careful you don't kink the AC lines when you lay it down. Getting to the gauges is gonna be a trip; unless you have arms like an orangutan, you'll wind up on your back on the driver's side with one leg up in the doorframe.
And be careful not to break off the drain hose on the bottom, if you have one. Mine broke at the box and haven’t fixed it yet. Lowered it 6 times to reach the break light switch, and finally just removed the dash bolts and lowered it too. Much easier to reach everything, and really didn’t take too much time.