Tommy;
As far as I can tell it is the original gauge. Based on Bill's comments and the fact the engine has been swapped, the current theory is that when the new engine and harness were installed, the wiring was run bypassing the ammeter. It is capturing the discharge going throught the dash harness to the electric components but is not capturing the charging being done by the alternator.
I plan to unhook the battery and all the wires from the starter and alternator and then running continuity checks to see where the wires are going. If theory holds true I will find that the wiring from the alternator skips the ammeter and sends the charge straight to the battery. I may have to re-direct/reattach the alternator wiring through the ammeter to the starter/battery.
More to follow when I get some time to really play with the wiring.
Bottom line is I full a lot more comfortable driving the truck. I was afraid it was just going to go belly up out on the road sometime. I am charging the battery and maintaining juice in the system, I just can't see it properly on the gauge.
