Flatbed Junk

I haven't had any overheating issues really at all. The main problem is it's fine at idle with a little surge sometimes, but when I take off it's fine for a little while, and then I put my foot on the gas, and it's just nothing! It stalls completely or just bucks around violently until I ease up on the pedal and limp home. It seems to happen so randomly that it's just irritating, but I don't even know where to start. It's almost like a sensor is telling it to stop putting fuel in.

Yeah, that's me, and it's a 2.5. My coolant looks kinda gross, but I tested it, and no gases are making their way into my cooling system.

So I finally went out of my way to make a profile on these forums because I've had enough of my Jeep, and I would love to drive it. I got this 87 Commanche about a year ago, and I haven't really been able to drive it because every time I drive it, it loses power and shuts down. Or I give it gas and get no acceleration. Over the past months, I've done a fuel pump and tested some sensors like the TPS, MAP, and CPS, with still no change in its behavior; the only thing that changed is no more loud fuel pump (yay). Other symptoms. I get good acceleration for maybe 5 minutes, maybe an hour, after startup, and then it falls flat on its face, dies, and has no power whatsoever. I'm new to Renix jeeps and have no idea what to do from here! Any advice on what to do would be much appreciated! Should I just start with sensors and vacuum lines?