Just go into your local parts store and buy a OEM alternator for a 1994-95 stang. Then go to a stereo shop and pick up some 4 guage wire, ends, fuse (150 amp), and fuse holder.
I did this conversion on my 91 GT and it is working great, I can have my stereo turned up with all my accesories and my battery still charges.
I posted some pics here:
http://forums.mustangworks.com/showt...ght=alternator
Don't waste your money, the "kit" is nothing special. Just go out and buy what you need.
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-1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway
-1994 Ranger w/ 427cid windsor (daily beater)
check it out!