65 C10 alternator conversion w/external shunt ammeter?

[mrdave03]

Ok... I have read all the conversion threads and am confused on one item. My 65 has an external shunt ammeter ( D on left C on right no numbers). No Gen light. If I convert to a 3 wire alt. Will this ammeter provide the needed 10 ohm resistance. Or will I still need to add a bulb or resistor inline for the 10 ohm resistance? It appears the brown wire goes to the dash to the ammeter where trucks with Gen lights it feeds the light.. I think I have the rest figured out but am not sure just splicing the plug wires at the old VR ..the brown wire to the white then white to #1 on alt. Then red to blue and blue to #2 on alt as shown in other threads is enough resistance with it feeding thru the ammeter. If I need to add a bulb or resistor where would the suggested place be to splice it in? Also will the ammeter still function with the new 3 wire alt?