DW has a Mustang specific kits and has a venturi. DW provides a corrugated nylon tube for venturi but they are prone to fail especially on E85.
Better use a good submersible gasoline hose - GATES has a very good one.
Walbro 450LPH has no venturi so you need to fabricate a T, it's much cheaper tho. It comes with a kit that contains a piece of good gasoline hose and a sock.
It will fit you OEM hat but requires some trimming. I prefer this one because DW400 cost 3x more on this side of the pond.
The best way to hook up a sensor on a late model Mustang:
https://www.ebay.com/itm/Fuel-Rail-A...72.m2749.l2649
You can use this sensor:
https://www.aliexpress.com/item/3305...589b4c4dncBXAH
Alternatively you can grab stock 2018 fuel rail that has a fuel pressure sensor but that's not even close to be p&p.
This is something you need to start with - if your inferred pressure tables are off your whole tune will be off.
You can try Roush inferred values for starter - will be way closer than stock values.