in a pickle any machinists?

OK i got you covered. Tickle the side of the head where the bolt goes through with some heat. A home depot self igniting torch with the yellow can of fuel (burns almost as hot as oxy/acetylene) will do just fine. Get yourself some paraffin wax (some crayons are made with it) and melt it into the hole where the bolt is. The wax will be attracted to the heat and sink down into threads of the bolt, lubing them. Get yourself a small left hand drill bit and slowly try to drill it out as centered as possible. It should walk its way up out of the hole.

Worse case scenario, it doesn't walk its way out of the hole and you just drill it out til you start to see the threads in the head and use a correct size tap to slowly clean the threads. When I say slowly, I mean SLOWLY. Turn the tap a half turn to 1 full turn at a time and remove to clean out the filings.