sound system

So instead of just waiting for an answer. I installed a high output alternator on my car. 2011 mustang with a sound system. alternator is from Powermaster. One youtube video from a retailer showed it a simple swap and using all the stock wiring. Dumb me knowing about the Big 3 thought it would...

ok I have a 93 mustang gt I bought from recently the problems im having is semi poor gas milage and overheating and my sub and amp just stopped working and my head lights randomly turn off first the mods list gt40 upper and lower intake gt40 iron heads not P heads bbk shortys with off road...

Silly question. What type/size screws retain the rear speakers to the speaker grilles in 1989 GT hatchbacks? My old speaker grilles were apparently modified to hold speakers in from the front, and now that I've purchased new grilles I am not quite sure what screws held the speaker on the grilles...