Dual "small case" CS-130 Alternators in my Astro. I rebuilt both alternators with 220 amp kits and put overdrive pulleys on both of them.
I built the bracket myself and it was much easier than one might think. Both of these alternators are charging the single under hood battery. Wiring the "sense" wire (the factory harness) was as easy as matching the same color wires. Both are wired in parallel.