The new plates we made are all 1/2" so that shouldn't be a concern anymore. As for the lifting capacity it says 2,300 lbs but I don't believe it. The engine is at least on the ground right now. If it would have been my machinery I would have just used the bobcat without the back how attachment. I'm just glad to have it here to at least get the engine and trans out.
Here's a picture of the new brackets I fabbed up real early this morning. Not the prettiest thing I've ever fabbed but at 2 am I wasn't to worried about how pretty it was. Much stronger than whoever mounted those upper link with a single bolt into the 1/8" body. These are all 1/2" with 1/4" tabs. Hopefully they'll at least make this thing safer for his future use.