Performance mods

I have a question for you ecoboost guys. I’m currently looking into picking up a 2015 XLT F150 , the two that I’m looking at one has 65k miles and the other has 98k miles.. I wanna start performance modding it but is it wise to do performance mods on a vehicle with higher miles?? (I understand both trucks aren’t high mileage) but I’ve never performance modded anything really . Any guidance and tips?