broken bolt while instaling hitch

[poo 95 rodeo]

this is a pickle. went to install hitch on my 95 rodeo. removed bolts that suport bumper to install custom hitch and busted 2 bolts. one side no problem
drilled out then screwed out old bolt, (with bumper off) fine for bolt close to bumper but the other bolt farther in is a big problem. only 4 inches of work room unless i cut metal. any help