Magnetic deviation for your location (according to:
http://www.ngdc.noaa.gov/seg/geomag/...alcDeclination) is:
3 degrees 37 minutes East...or about -minus 4 degrees, making your original estimation of 176 degrees correct. I don't know where the 92 degrees comes from. The ever-popular
IA5 at 97W would then be a good candidiate for true south. Since you're getting that and G3C, I'd say that--motor weirdness aside--you are "good for go" despite what the other article says.