I'm looking at a Declo 50 amp idle / 105 amp WOT. It's bigger & heavier than the mini Denso 45 amp I had previously as I found an OEM Volvo electric fan & shroud that fits my radiator nicely. It should cool nicely but the draw is 40 amps extra over what I ran previously. The Delco alternator is 11.2 pounds vs around 5-6 pounds for the mini's. This is a 16 volt unit.
Anybody run a cog (not serpentine) alternator? Have a source? I found this
http://www.blackmountainprecision.com/bb4.htm