Ok, so I replaced a lot of wires rendering my electrical system NEW. Everything seemed to be in order 14 volts while running no problems. Then the problem came back again and it died at a light like a switch turned the Truck off. It was at that moment a light bulb appeared above me head. ( The kill switch!) Yep my 10 year old kill switch was acting up I could jiggle the switch and the MSD fired up.
I felt like a tard and was happy at the same time to finally track down the problem. Easy fix... in the end =)