Originally Posted by
thumpism
You could remove the fixed cup and BB from the other side... Lots of soaking with Kroil or PB Blaster and some heat before trying the wrenches, of course.
...if you can get out the fixed cup and spindle on the other side, buy all means do so. It's got flats, and you can hold a fixed cup wrench on with a bolt the same threading as a crank bolt, and some fender washers. I've never had the same kind of results from anything like Kroil or PB Blater that I get with 50-50 ATF/acetone as a penetrating oil.
When you heat it, focus your torch heat on the cup itself.