I feel your pain. Maybe reach out to Ryan Sneke Eyz on 300M forum. He has a couple old Mopars, maybe he has run into similiar problems or maybe knows someone who does. LOL he and Scott have a brand new crate motor Scott won as a door prize at Carlisle a few years back........sent you a PM.
It appears a lot of the "Lean Burn Conversions" relate only to the ignition and the original carb is left in place.
Ed-Doba...do you see any wiring going to the carburetor? Or "block off" plates?
I do believe it is the original carb (it's the Carter 2 bbl) There's a couple wires here and there. (I'm trying to upload some pics to my Imgr)
The ECU is an "Echlin" brand "TP 51"
I think I just squashed the "something is getting hot" theory. The car has been sitting for a good three hours, nice and cool, so I decided to go out and see what she'd do... started right up, only this time, it idled for about 30-45 seconds, then shut down. So now I'm leaning back toward fuel delivery.
Tried starting/running it with the gas cap off when it acts up?
I have. My guy over at the F/M/J body forums suggested that after replacing the "jumper line" going from the tank to the main line. He's suggesting that maybe that jumper line is dry rotted/cracked and sucking air. I'm gonna have to empty this tank and pull it to find out.
I'd dump the Lean Burn carb entirely and not even bother trying a rebuild but that's just me.
I'm assuming the only difference between what you have and a standard Carter 2 bbl would be the castings or additions for the additional sensors. The internal fuel circuitry would be the same. Wondering what they did to eliminate the Electric/Mechanical choke on the Lean Burn? Whether the carb body is a different casting to eliminate the choke or a simple block off.
Better start sourcing the other FSM manual parts. Looking at your picture of the original manual it appears to be just the "Body" section. You need at least the "Powertrain" part or whatever they called it then.
Sorry...I don't have any complete FSM manual sets other than for an LH car!