Alright. Stupid mistake. I didn't have the MAF connector plugged in when I started it the last time. Strange thing is, it makes no difference if it is plugged in or not as far as the truck running the way it is right now.

Plugged the MAF back in. Pulled the -neg battery cable for 10 minutes to clear codes. It started somewhat reluctantly and idled for 10 minutes. No check engine light. Back to square one.

I turned on the AC and the idle will adjust somewhat. Bogs the engine down like its going to die, and then slowly compensates, but it idles very low. I'm wondering if I have my idle speed set correctly. Time to read some more.