If you are talking about the brake flex lines, then there is an adapter to mate the stock drum Fox brake line to the SN95 flex line, you just have to put a bend in the hard line to shorten it. I guess we need more info about your setup and what you are doing to answer you correctly.
Sorry guys, my fault for not providing accurate info, I mean the front flex lines. The guys at the salvage yard just snip the brake line instead of unbolting it from the hard line. So, I was wondering if my fox body's flexible brake lines with mount to the calipers of a 95 GT?
it might bolt up, but i think it may be a little stretched, you should prolly replace them.... check out this link from Ford Racing, its great instructions on the cobra brake conversion, which might help you out Cobra Brake Conversion
From Matt's pages, http://svo73mm.cjb.net he says you can use them with the later calipers, but there is a lip on the line to keep the lines from rotating on the calipers that would have to be ground down to use them with the 99+ calipers. I don't know about the 94-98 calipers.
But if they are the original lines, I would get new ones simply to be on the safe side. My originals were so cracked and dry rotted, I'm surprised they didn't fail on me.