Had the same problem. Bar & bushing lubed, A arms out straight, pry bar in place, bushing pops out as sway bar goes in.
Took me about 15 tries and many rest breaks, as my arms felt like they were going to fall off.
One thing I did not try, as I didn't think of it until later (after madness/stupidity wore off).
Clean and super glue the bushing into the A arm. Perhaps clean off all the lube on the outside of the bushing with IPA or brake cleaner & install it. Then a little super glue dropped in between the bushing & the metal on the side that the sway bar needs to enter through.
Hope this helps...
__________________
Doug

84 Carrera Coupe - Black (the Goth look)

The more I learn, the more I realize I don't know