Thanks for the warnings fellas. I do try to be careful with any tool in the shop, but especially electricity!
Here is how the intake came out of the vat after 2 and a half days...

Most of the articles I read said something about taking a wire brush to it because all of the rust left on the iron piece would be silt like and come off pretty easily. I can vouce for that. Anything brown on there just wiped off or maybe peeled off in the places. A wire brush with little effort did the trick. It did loosen up all the stuff inside the runners too.
Here is what it looked like after 5 minutes...

And this is what it looked like after I put it in Duplicolor engine primer gray...

I was impressed by what it did to the inside more so than the outside, but it certainly did its work on this manifold. I guess for the "crispy" parts you have this might be a good way to go if you are willing to wait. Of course, this thing was in the vat for a long time, but I wonder how much shorter it would have been to just turn it up to the 10 amp instead of 2 amp setting? I went ahead and threw in 2 headlight buckets in the vat after I cleaned it out and set it up again. Should have done before and after of those too.
I will make another post about the ultrasonic cleaner though. This afternoon, that thing did a great number on a 2 barrel ECG carburetor with just that $ store Awesome cleaner bottle and water. Unbelievable. Wonderful results. What it did not get off after I pulled it out of the tank, the gunk just wiped right off.
Daniel JessupLancaster, California
aka "The Hot Rod Reverend" 
check out the 1955 Ford Fairlane build at www.hotrodreverend.com