1977 300d Help

Well, my old 300D, 365K miles, needs the starter replaced, for some reason, that bolt was the tightest one I have ever tried to remove, especially since
it was in a very oily area on the car, I thought it would be easier. But nonetheless, after getting a hex socket, to remove the bolt it seems stripped. This is the lower bolt, there are also grips around the outside of these rounded bolts, they look a lot like the bolts that hold on the overhead cams, is there a tool that a mechanic can use to get a stripped one of these out, or does it have to be drilled etc. I would really appreciate some help, as the car has been sitting for a month while I sit here trying to figure out what to do with it.. Stumped, Jim
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.