Wow, what a lot of good information is out there, thank you.
Here are some pics of the engine, it doesn't look to me like the Google photos of the LT-1, was it modified? It has aluminum heads. It doesn't look like the water pump is cam driven. Apparently the car was wrecked 6 years ago and my friend saved the engine and transmission just as car was being hauled to the scrap yard. It was crushed, no ECU, no wiring harness.
My present thought is to see if an HEI distributor can be fitted where it used to be on older small blocks? Maybe with a carbureted intake manifold and an older style cam that would have the drive gear? I am not sure what transmission it has. I expected a 4L60e transmission, I don't think that is what is there, and I'm not sure it will fit in the drive tunnel of the El Camino. I couldn't find any electrical connections on the transmission either. Looking for more guidance. Thanks.