I'm getting ready to put a new Head Unit in my 94... I've never touched audio before, so a guy I know who works at a stereo shop (Asst Manager) told me I needed to bypass an amp in the dash that drives the tweeters (since my head unit has a built in amp).. He didn't know where off the top of his head... Whatchall think?

haha. I just wanted a CD player that'd play a CD decently. 
Give the harness a shot anyway, worst case is you have to run speaker wire directly from the deck to each speaker.
Glad you have a sense of humor and didn't mind me busting your chops a bit.