NEED MASSIVE ADVICE FROM THE GUYS THAT KNOW, CAUSE IM NOT A GEAR HEAD.. EVEN THOUGH ID LIKE TO BE..LOL

alright.. here we go... i bought a mustang from a guy that was gonna junk it for 500 bucks... cause the engine was blown, and the tranny sucked.. i had a new engine put in , and a tranny ( nothing of performance, just junkyard stuff that works )

ive done little things like the lights and sound system, but now i wanna do suspension and brakes.

1. Can i put cobra calipers on any rotor, or would i have to get the whole cobra brake hit for that ?

2. For a good shock/strut kit, what should i look for . cause theres all sorts.. shocks with the springs on em, without em, i even seen a kit that comes 2 shocks, 2 struts, and quads.. what are quads ?..lol

3. control arms.. which is the upper, and which is the lower ? and would it be a good idea to change them out ?

 any info is greatly appreciated..  e - mail is  dxrey@hotmail.com 
aim s/n - silentscreams943