Sorry guys, I was in a rush earlier and didn't get to type much.
I did originally check the dizzy and there were no obvious signs of moisture so I skipped it. Seems to me the issue would be more consistent. Lets follow the series of events:
-Broke down, truck wouldn't idle and had no power under load suddenly. No advanced warnings.
-Checked jets, vacuum leaks, etc whatever I could on the side of the road. Still had spark so skipped that process.
-Got it limped to Master-O-turbonics shop. Missfiring, wouldn't idle, ran like it was on two cylinders, but if I pumped the throttle or drove hard it seemed to settle out.
-Got there and it seemed to be running fine at that point. Slight hesitation, but it still ran better and almost normal.
-Left the shop and it ran good all the way home, except it didn't seem to idle consistently.
-Got it home.
-Popped the dizzy cap and took a quick glance. Nothing. No signs of carbon tracking, looked fine.
-Cleared out all the passages with compressed air/carb cleaner.
-Looked for vacuum leaks, found none, but found carb stud was loose. Made a new gasket and fixed the stud/crack.
Now today.... Seems like I was able to get the thing to idle after a short time warming it up. The idle would jump up and down, until it was up to operating temps and it was fairly consistent from there. Tried to drive it, but under load it stalled again, and stopped idling.
The reason I'm still focused on carb/fuel delivery is because when it's warm and idling strange, I can close the choke slightly and it will stabilize. Also, when it starts to stall, if I grab the throttle and pump it a bit, the extra gas from the accelerator pump seems to steady it out and it revs just FINE...
Also seems pretty strange to me that the fuel filter under the hood is only getting about 1/4 full. Seems like it should have a LOT more in it then that. Hence why I'm wanting to focus on fuel delivery... It's very possible something else came about when I pulled it all apart. I have not checked the pump yet. I'm going to get a pressure tester from work and just measure it out. Should be simple.
But, you guys are the experts here. I'm just here to learn so suggest away, I'm willing to investigate anything. I'll pull the dizzy tomorrow morning before work an see how she looks again. Got some WD-40 on hand.