This is taking me way back. Does the truck have points and condenser or does it have an computer box? If it has points and condenser, I would start there. I remember condensers that would overheat and cause this type of problem. Replace the points at the same time. If I recall, with a V8, you want them around 45 degrees dwell.
If it has the computer module box, replace it. They did the same thing.
NOTE: Everything I just mentioned deals with a loss of spark to the plugs when the truck doesn't start. If you have spark and it won't start, let me know. We have some carb work to do.
Look forward to hearing from you, and thanks for using 2carpros. Com.
Joe
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Friday, December 18th, 2009 AT 11:46 PM