Alright, the alternator I installed in post #23 on 9/5/2015 died this week. Battery is a nice Optima yellow-top beast (deep cycle capability) - so fortunately it did not harm my battery when it died. It was weird to watch the voltage drop off on my AeroForce interceptor as the battery lost voltage when the alternator died...first the traction control light turned on...then the ABS...then the battery idiot light...then I lost tach and speedo...then the car started to run rough and I pulled over. My wife brought me my Honda generator and my Optima battery charger - and I enjoyed some food at a local restaurant while it charged up, then I made it the last few miles home after my battery had a full charge.
So, deciding I'm tired of these crappy OEM Motorcraft 6G alternators, I installed a DOB bulletproof Denso unit I had bought a while back. That took some fabrication, as I ordered a rear Denso mount bracket from Roush that holds the rear end of the alternator to the supercharger's intake manifold...but the bracket did not match the orientation of the DOB alternator...or the OTHER DOB Denso alternator that I have (off of Skwerl's wrecked Bullitt), so I had to fabricate / weld up a modified bracket. Got that done, got it painted, installed...and I'm back in business.
However...here are my voltages read off my Aeroforce Interceptor (OBD-II plug):
Idling: 12.0-12.6
Cruising: 12.6-13.1
IAT's are around 127
Does that seem normal? (Voltage seems a bit low to me). Perhaps I should datalog voltages with my SCT....
Edit...I saw Bruce posted 13.3 is reasonable when it is hot out...I guess I'm close at 13.1 to that.