Fuel injection questions

Hello all,

One of my neighbors has offered to sell me an 88 1/2 ton truck with a 318 tbi/auto trans for a mere $400. I'm going to go get it this week. From a looks perspective, it's a lot nicer than the price suggests. All the paint is there and the interior isn't ratted out. That's the white meat, now on the the red meat lol.

They put a 318 engine in this truck to replace the original one that had blown. That engine came out of the same year van, according to the owners. In 6 months of tinkering, they have yet to get it running. Him and his son are completely clueless on fuel injection and have wasted a lot of time with it. The engine is getting so much fuel that it is filling the oil pan with raw fuel. They have replaced both the injectors in the throttle body with auto zone units and still have the same problem.

I can't begin to tell you what it even looks like under the hood but they said all the connectors are plugged in where they need to go. For the price, I can probably scrap it for 80% of my investment and CLEAR the engine and tranny so I'm not worried much about it.

Here is my thought process;
Fix the truck and flip it, or possibly pull the motor and trans and put it in my '66. I can still make the truck run again with the slant six, so I'd have a running truck either way.

The thought of having fuel injection in my '66 is killing me. Especially since the ECM, wiring, and everything I probably need are going to be in the truck already. However, I need to fix it in the truck before making that decision. Any ideas? To me this screams grounding issue, but I'm no expert on this stuff.

I can always get a small block intake and put a carburetor on it if I want, but I'd rather see if I can fix it right. Let me know.