leaf spring bolt removal

[81shortstep]

hey guys im in the process of taking out my leaf springs but they are giving me some issues.i soaked them in wd-40 and left it for a while and the nuts wouldn't come off so i cut the heads of of the bolts and tried beating them out well i got 2 of them out this way but the other 2 won't come out.i beileve the bolts are rusted into that metal sleeve so if you guy shave any tips on how to get these last 2 out it would be very helpful...

thanks
mark