Tranny Bolt Nightmare

I have 3650 and I am trying to take it out to put in a clutch. I have every single bolt out except for one on the top that is completely rounded. I mean it is like shiny smooth now its so bad.... We have tried everything, we went down to sears and bought a set of "bolt-out" bolt removers (they were terrbile and I think even destroyed the bolt further) We have put an impact on it, 1/2 inch breaker..... It just wont budge and now that it is round I am just completely stuck.


I mean we are to the point of considering pulling the motor or cutting a whole in the floor board to get to the bolt..... At this point I dont even care if we break that ear off the bell housing, I would rather replace that then pull the motor. Today my buddy is comming by with an air impact hammer with some chisle and pointed bits; we are just going to try and destroy the head of the bolt to at least get the tranny out.


Can any of you offer me any better advice on what I can do?

I appreciate all of the help guys, thank you very much. I just installed comp 270's over the week and have an 03 cobra clutch ready to go in. Cams were a breeze and then I have a stupid problem like this!!!

Just to let everyone know I beat on that grade 8 bolt for over 7 hours with a bad ass snap on air hammer and barely bent the bolt. I flatened my chisle bit as well. I eventually had to hit the ear of the tranny with the hammer from the top. Had to break the ear off around the bolt in order to get the tranny out. Once the tranny was out I backed the bolt out by hand...... Very strange. My advice would be to work on those top two first and get the others done last. Thank you for all the help.