Which brake line kit to go with?

I am confused as to which brake line kit to use. What is the difference between the different braided stainless steel brake line kits produced. I have 5 lug converson on my 90 GT with Bullitt brakes but I want to put it all on my 95 GT and swap the 95 stuff to the 90. I got these brakes off a parts car I bought on Ebay but it has stock Cobra lines on it. I want the good stuff but which one do I get? On ebay, they list 2 different cobra brake line kits... one for 94-95 and one for 96-2001. Which one do I get? I'm assuming the 96-2001 because the calipers I have are Bullitt style. One more quick question, do I change my master cylinder or brake booster or is it the same as a Cobra? I never got around to putting it on the 90 GT. If someone could help, I'd appreciate it.

Thanks for the input but I think I worded the last part wrong. I meant to ask, "do I change my master cylinder or brake booster ON MY 95 GT or is it the same as a Cobra? I never got around to putting it on the 90 GT (I never had time and trust me, the brakes never felt like Cobra brakes without that MC and brake booster installed) so when I switch the brakes over, do I need to install that Cobra booster and MC or do the 95 GT ones fit the bill for the Cobra brake upgrade?