HELP ME : keyless entry and speaker sizes kind of long PLEASE READ

[S13inyourface]

i have an 89 fastback, i have no clue where it has been in the past, there are wires exposed like the ones that go to the 3rd brakelight, i think my car has been like in a bad crash. anyways what are the sizes of all the speakers, and what remote keyless entry should i get? i want to get one that has trunk release and when it locks, the lights blink once, when it unlocks the lights blink twice or something like that, there is a best buy right by my house. if i get a keyless entry do i still have to get an alarm? im looking at one of those viper ones that have a picture of your car, and when something is opened, it shows what is opened

[Rex]

Factory speakers for you car should be 4x6 all around, it's definitely worth upgrading those to 6.5's, but will require homemade adapter plates up front (trace existing pod/plate, cutout, make hole), not sure about the rear??

Not sure on keyless, but one thing to do is go ask the local Best Buy or independent shop, just to get information. I'm assuming y9ou could do just keyless, but not sure why you wouldn't want the alarm as well??