Ok, I can't quite pronounce this thing dead. There is a glimmer of hope. Like I said, there are two pinholes on the side of the block, right above the exhaust manifold. Something must have been thrown right through there on the way out. Hopefully not an internal engine component. But maybe not, just maybe it was something else that got in there, and I can just patch it up and call it a day (quicksteel will do anything). Crazy as that sounds--it can work IF it was a one-time freak thing. Then I could run the crap out of it for as long as I can instead of completely losing my @$$ on it, which I'm looking at doing if I get rid of it now. If I'm looking at a complete engine swap anyway, then why not?
Here's the thing: the car runs pretty well, actually, with the exception that it is running VERY rich. I realized that I'm not puffing any white smoke any more (and what I did puff could have been the result of other things, as I had the TB off, cleaned it, had all the plugs out, had a little residual moisture left, have seafoam mixed in the tank, etc.). I am, however, puffing a steady stream of blackish smoke. It doesn't smell like rotten eggs--it smells like fuel. It's just gas.
A mechanic fridn of mine came over and did plugs and wires on it last week when I was busy. He's done a lot of work for me in the past and knows the Toyota 3.0 very well, so I doubt he screwed anything up. Maybe I should check the gaps--but I don't think something that simple would cause it to run this rich. I already made sure he ran the wires correctly and that all the vac lines were hooked back up.
I don't want to dump a bunch of money into it replacing O2's and whatnot. So I'm thinking that if I don't hear anything obvious from you guys, I'll be taking it to the dealer for diagnostics (unless there is a cheaper alternative to diagnosing it).