Okay well after a month of chasing my tail I resolved my stalling issue.
Here what I went through, and what I think the issue was.

I sent my truck to my neighboring Auto Garage for Inspection. These guys are literally my neighbors so When the truck was finished they parked it where I normally do at my house.
I got a text from the Garage saying that the Truck stalled when being parked and wouldn't restart. I thought this was suspicious but whatever.
I put a new TFI module on it and the Truck started right up. I thought all was well so I drove the truck on a 50 mile round trip. Upon returning from the trip and exiting the Highway I stalled on the road.
It started up right away and got me home.
It continued to do this for the next 2 days. I figured It was either the crap TFI module I bought (or the DIALECTRIC Grease it came with) so I Bought a MOTORCRAFT Module. The Motorcraft Module (Bought from Ford Dealership) Didn't come with any Grease so I purchased Gold Intel Heatsink grease from a computer store and Installed module. It seemed to fix the issue. I drove a good bit around town and then took a 30 mile drive to another town to purchase a Bumper off craigslist. It ran fine.
On the way home I started stalling again! I couldn't believe it.
I drove it the next week while it intermittently stalled more and more frequently.
Until it wouldn't run more than a few seconds at a time.
I had it towed home on a flat bed and replaced the Stator (hall effect switch).
Nothing changed.
I then changed the TPS sensor. Still nothing,
I have already replaced every other ignition part to this point so I started considering fuel pressure, or Ignition switch itself.
Finally I realized it wasn't getting spark once it stalled.

I decided to reroute the TFI module off of the Distributor and Mount it on a heat sink. I bought the Kit from McCully Racing and changed it out with another TFI module New from the Ford Dealership.
This time It works! Its been over a week now and I made a 1 1/2 hour drive and its still going with no stalling issues.
Here is what I believe to be the cause, and feel free to correct me but its the only thing that makes sense to me.
I think the stator was bad , causing the TFI modules to fail prematurely. When I replaced the Stator I reinstalled the latest MC TFI module and it still stalled.
I think that the Stator already caused the MC Module to fail thus I needed to install a new TFI after changing the Stator.
Now I have a new Stator and TFI and all is well.
It goes to show that It could take some tail chasing to find the issue.
Who would have thought it would take 3 TFI modules to fix my truck!
Good Luck and keep persistent!

 

I have an issue like yours. Heat related. It's hot again. 3rd year running. Like you I've decided it must be fuel since I've changed all ignition parts including fist. Write back if it continues.

 

So far the TFI module relocation did the trick! Has been over a week and I haven't had one issue.
Thanks