My dad wants to get some new speakers for his 2002 f-350. i was on crutchfields website and it looks like they are 6x8's or 5x7's all the way around. he wants to hook up an amp to his new speakers too, which i have never done a setup like this. it is all going to be hooked up to his stock ford radio too, which is another thing i have never done. Any suggestions on some speakers and amplifier combos?