yes it is possible. very possible. u'll need an rca adapter mostly. as long as ur stock alternator can handle ur amp u'll be fine. most stock alts can handle about 500rms. MOST is the keyword.
ok rcas carry the signal (music) to the amp. well most factory H/U 's don't have rca jacks. so this adapter hooks up to a speaker in ur car and makes it so u can plug rca's in. that way u get the signal.
i bought one for like 10 bucks. they should have them at a local shop. i bought mine at video kingdom cuz they sell car audio.
nebraska isn't a bad place at all. but dude just to let u know i live on a farm. so i'm not in the city like u.