Wow those are very helpful pics of the engine block. I'll play around with the hold-down bracket and bolt and see if I can get it to stop wobbling. Hopefully I get some time after work today. Now that I have the truck at home I'm not restricted to working on it once a week or every other week.

No idea about the vacuum line right? I'm trying to order it but can't see the exact replacement and don't really know what to search for. If not, I'll try to make the existing hose work by putting some shrink tubing around the cracked part. Let's see if that keeps it in place.