[BlazinC5]

Ouch, that really sucks. Unfortunatly, with the bolt still in there, you may not have much a chance to get them out. If they are new bolts and they went in fairly easy till the nut gave out, you may be able to put a screwdriver between the bolt head and pry down in hopes the nut may grab somewhere as you try to back the bolts out. But you still have the issue of the nuts not beeing solid.. So you would still most likely have to cut into the top. Sorry, for the bad news.. But I don't think there would be any other route to go on that.