Depends on your definition of "better". C6 is SIMPLER - all mechanically controlled. Without the GVOD, it's less efficient of course. E4OD is more efficient, not just because of the OD but the ability to lock the converter. So they're "different", each with their advantages/disadvantages. Doesn't make either one "better"; that depends on the importance of each of those differences is to your needs. I sure wouldn't swap trannies just for the sake of it.
When my 86 lost all power, it was the glow plug harness dead shorting to the intake manifold. I had numerous wires that got smoked. a little FYI, if your wire has leaked out all of its smoke, it no workie no more.
Finding the short was just back tracking hot melty wires. Fun times!
So I know this thread is old now, but I didnt want to start a new one unless I had to. But about 2 weeks ago, I finally found time to monkey around and try and find what was wrong with my truck. For kicks and giggles, the first thing I did was put my key in and turn it to the run position. Everything came on and I even cranked the truck. Been driving it since. But I really want to know what it is lest it happen again, because this is the second time its done this and I really cant afford a third.
Just going from memory; another member might have a pic -- among the main power wires coming off the power junction terminal on the starter relay, there's one big fat yellow one. A little ways down that wire from the relay it has a quick-disconnect. That's a common failure point which would basically shut down everything electrical in the truck.