I just wanted to prove I would not be defeated by a rust frozen longbolt. I used a cutoff wheel to slice the bolt between the knuckle and the control arms, and pressed out the bushings with the stub intact, an pressed in new bushings using a bearing press. I bought the whole knuckle/bearing/hub/backerplate from RA .
This sat in a corner for months, just annoying me. I tackled it today freehand using a benchtop drillpress and 1/8 and 3/8 bits.
I won't do it again. This part of this generation of Subarus stinks.