I can say this from experience, it is naturally ideal to use the same trim package and year of harness, however some higher or lower packages "may" interchange as well. I will not promise it as I know for example, the Crown victoria wire harness between an LX and a P71 are very different.
Salvage is a possibility, however in my experiences, most prefer to scrap wiring, failing to really understand the profit for an undamaged engine or dash harness. they prefer the sawzall and move forward tactic to just get engines out as quick as possible, and don't worry about everything else.
Salvage is a possibility, however in my experiences, most prefer to scrap wiring, failing to really understand the profit for an undamaged engine or dash harness. they prefer the sawzall and move forward tactic to just get engines out as quick as possible, and don't worry about everything else.