Pay close attention to how the new bolts fit before you just throw them all out....
Many people are using all china junk...and the bolts included... so thread them by hand and see if you can rock them at all in the threads...
If the bolt broke from being stretched they usually back out, if it broke from being killed in there or cross threaded they usually need persuasion.... a stretching bolt you can feel as you tighten it there is something wrong