Well, this afternoon I was driving across I-80, west of Lincoln, NE when my 300D started making a load mechanical noise, and bellowing black smoke. I took a look, and the vacuum pump had exploded (big hole in the casing). I pulled out the loose parts, put some duct tape over the hole in the pump, and limped to the next exit. Now I'm in a motel in the middle of NE. My wife is coming to rescue me, so I'll get home tomorrow. I need to decide what to do with the car. I either need to have it towed about 500 miles to home, or my local indy, or I need to find someone near Lincoln, NE to fix it. AFAIK, it's just the vacuum pump, the engine seems to run normally, except it's putting out a good amount of black smoke.

Will just the lose of vacuum cause a 617 turbo to run very rich, or did I break something else too?

The engine starts and idles normally (except for the noise the remains of the vacuum pump is making). It seems to have normal power, but I didn't try to run it above about 1500-2000 rpm. Hopefully, it's just a matter of bolting on a new vacuum pump, but we'll see.