I'm also using the Geo alternator as it mounted nicely down on the side. But it is the 65 amp version. I can't remember which year it was, but when I bought it, the parts guy informed me that it was available in both 55 or 65 amp versions so the choice was obvious.
        The internal voltage regulator failed while I was still taxi testing. A replacement was ~$30 and would have to be ordered, but they had plenty of ford external regs for ~$7, so I converted to one of these. It only took about 1/2 hour to figure out how to do it, then another 1/2 hour to do it. But I recall seeing a written procedure for converting it since then. Most likely on the AeroElectric site.

Todd


Very nice.  I'd heard before that t was [possible to
mount the Geo alternator on the 13B, but I hadn't ever
obtained one. I also "feel" that the Mazda is more
reliable, but that is just based on knowing how GM
cuts corner, especially on low end cars.

I'm curious if you weighed the stock alternator, and
the Geo, to see how much weight difference there is.
I'd be prone to change just for the weight loss.  55
amps would be more than enough.  I've never seen more
than about 40 amps after start, and that is just for a
few seconds.  Normal running current seems to be in
the 13 amp range, with just engine and GPS/Comm.