Far Cry 5 models modding tool allows changing almost any skeletal model in the game for a custom model.
Examples of modified hair and clothes:
1. Import or make your custom model in UE4.22.3, build it and save (you must get .uasset & .uexp)
2. run corresponding tool for clothes or hairs (fc5mod_xxx your.uasset original.xbg) - this will make XBG file
Example: fc5mod_hairs.exe myhairs.uasset hair_straight02_aver_f.xbg
3. Import XBG file into the game using Far Cry 5 Resistance mod
p.s. There are some restrictions. More detailed help will be added later.