Truck is stalling out after driving a quarter of a mile

Let's step back just for a moment and clarify if this is happening prior to the parts replaced or after? Did you replace these parts to try and repair this or is this a result?

Clearly this sounds like a fuel issue so let's start with checking the fuel pressure when this happens even though you just replaced the pump.

Here is a guide that will show how to do this:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If this is not the issue, then it could be a converter issue. However, that normally causes a lack of power and not necessarily a stalling concern.

The way to try and confirm this is to remove the upstream o2 sensors and see if the engine still stalls. However, when this runs for a quarter mile, is it lacking in power, or does it drive well?

Also, will it idle for a while and it only stalls when you drive for a short distance?

Depending on all this we can go in a different direction but here is a guide that will help with this issue to get us further into it:

https://www.2carpros.com/articles/engine-stalls

Let us know what you find, and we can go from there.

Thanks