Riding his own ride...
read the bottom of the black box on the pc3. It will list every part number you can convert that unit to with merely changing the map. If both of those part numbers are on the bottom of the black box then you can turn that pc3 into either part number depending on what map is in the pc3. if that ignition module works on one of the numbers on that black box (at the bottom) then it will work on all of those numbers as it's the same physical unit for all of those part numbers. What distinguishes it is the map inside it ONLY.