I've done a couple Ford style 1-wire conversions. Google "Ford 3G alternator conversion" for help. I've got pictures on a few of my threads for both the 6 and 8 conversions I've done. I'll track down specific threads if you need me to. We're about to do the same conversion to Gene's Ranchero (Smithkid) too, so you will probably see pictures related to that here soon as well.
Powermaster and Chevrolay or others all do the same thing. Money and bling-factor are typically the only difference. The Ford 3G alternator is normally a serpentine system, but you can put a v-pulley on them. And they put out a lot of juice when/if needed (both of mine are 140 amp versions) - but I've not had a problem overcharging. Usually if you have overcharging, it's traced to an older style regulator (mechanical) and that can be remedied using a solid-state regulator. But sometimes it's a bad connector and the regulator isn't sensing the correct voltage of the battery and thinks it needs more. And sometimes it is a gremlin. And not the AMC kind. A one-wire system will require a large one-wire to the battery though a large fuse (about 10% larger than the max current capacity of the alternator), so it is a pretty simple install.
Good luck!
My Ranchero with a 200 six and the fuse block I added.
http://www.rainierfalcons.com/forums...&postcount=298
My update to a V8 with the one-wire 3G.
http://www.rainierfalcons.com/forums...&postcount=521
The picture attachment is the Ranchero motor before it had a V8.
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