t5 trans swap?

so if i go with the mopar 4 speed linkage and pedals, all i have to buy is a hydraulic slave master cylinder? do i need a hydraulic throwout bearing as well? how come i need to use hyrdaulics anyways if im going to use a mechanical linkage? sorry if it sounds like a stupid question...not exactly familiar with how the parts work or what they look like...like i said the cable route does seem easiest, and it seems cheapest too- if i can make the mustang pedals work in the mopar then i will, and if i can make the mopar pedals work cable wise that would be great too, but id like to know my options