Busted seat belt bolts!

[K10mashup350]

So I'm now working on the interior of my truck an the previous owner removed everything including seat belts but as they did it they busted 2 of the bolts in the floor (drivers side belt, and pass side buckle).... I'm wondering if there is anything I can do to get them out without having to get the drill n tap/die set out??... I've already tried putting visegrips on the bottom an tried to spin them out that way with no luck... Is there another spot that I could mount the belts without having issues?

Any suggestions would be helpful, thanks