95 ej1 suspension question

[pacocrix]

first want to know name of the arm thing that holds the whee bearing an rotor an all that (this is the big steel arm that goes down that one that the uca ball joint goes into to)

this is the part that i hav the question about, im swapin the entire suspension front an back from 99 teg into my 95ex (idk if there will be much help in the front maybe holdin weight of b18 but idk i could get parts cheap an i need all new bearings an ball joints so if cant hurt) question is this big arm i dont know name of is rusty

so can i use the ones off my car now?
should i get another set an just not mess with it?
how big of a pain in the @ss is this about to be?

also need to know if the wheel bearings HAVE to be pressed or can u just compress it with the axle nut?

please help tryn to do swap asap


thanks IA