Forgot something, if you really need those bolts out versus just the pins, I would bet the bolts were installed with lock tight, heat is definitely your friend when dealing removing bolts that have had lock tight applied, especially the red stuff.
The Slider Pins are secured by threads at the end where the Hex Head is located. The short Hex Head Bolts sevure the Caliper to the vehicle spindle. This is the starting point.
I have said before but I will say it again. Remove the Caliper to Spindle bolts. Disconnect the hydraulic brake line. Install new Caliper and Pads. Reconnect Hydraulic brake line and bleed brake lines.
If you can’t do that procedure get someone who can . Brakes are too important to not do correctly.
Good Luck.
I have Serviced Ford Vehicles for 60 years.