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Does the vehicle have spark when the no start condition occures?
How many miles?
It is important to verify that it has spark before we go forward with the diagnosis. Remove the coil wire from the center of the distributor cap and hold it near the engine block ground. Have someone crank the engine and see of you get a good healthy blue and orange spark.
I have access to the wiring diagrams and we can look into the fuel pump and cooling fan issue once we see if it has spark.
The most common problem that fits your description is the integrated controller that is located at the top of the radiator support. These units were known to go bad and cause exactly the conditions that you describe.
If you want to go through all of the electrical tests to verify this, let me know. Otherwise maybe you can find one of these at a junk yard for a few bucks and give it a shot.
Please accept if this helped you.