So today, still waiting on the Voltmeter in the mail I went about the truck to verify the ground as that is CLEARLY the issue. I discovered that the location the previous owner had placed the Negative cable and what I believed to be a correct placement on the Alternator housing was in fact incorrect. I found the torn off fragment of the cable still bolted to the frame from the engine swap. I removed the Negative and the jumper to the main ground direct and placed them bolted to the frame and the truck runs and is happy lights on or off and no issues as of yet, stalling etc solved. I am always blown away how big electrical can make an issue seem and how little it actually is. All the same the systems in the truck are improved by my efforts and now on to redoing the front end and suspension.

 

Glad you found the problem. You will be happy to have that meter in the future to help with electrical diagnosis.

George