8) there are a few ways to make the conversion, most to do with wiring, but you can either use the alternator brackets from a later small six, or you can get conversion brackets from places like autokrafters and national parts depot.
as for the wiring, you have three ways to do the conversion;
1: you can convert the generator wiring using this diagram
http://www.mustangsteve.com/GENtoALT.html the changes are simple
2: you can get a one wire conversion kit for ford alternators up to 60amp. this kit includes a wire that allows you to keep the indicator light if you wish. i did this one with my 64 falcon. you will have to use the above diagram as a reference as to which wires can be eliminated, and which ones need to be used for the conversion. feel free to pm or email me with any questions regarding this conversion.
3: if you need a high amp output alternator because you have an electric fan and/or a thumping stereo system, you can use the 3G ford alternator or the powermaster alternator(you can get them from summit racing). there are diagrams available for converting the 3G to work with older cars, i have a couple of articles for the swap, though i have not done this conversion myself, yet.
when doing a conversion like this, make sure you understand the wiring before you cut and splice any wires to prevent any minor issues, like the car burning to the ground due to an electrical fire, from popping up.
as for determining if you have a generator or an alternator, if you have what looks like a gm A6 a/c compressor with wires coming out the back end hung on the side of your six, you have a generator. if you have something half that length you have an alternator.