I know the car needs to be sitting level with the suspension loaded, but can I just take off all 4 wheels and put jackstands as far out to the sides as possible on my front control arms and rear axle to load the suspension?

 

yes, that works. i used 2 "Rhino" ramps (the plastic drive on ones). this got the car in perfect position, but it was incredibly hard to weld them on since the clearance is minimal with those ramps. get it up as high as possible.