Wiring confusion

I am deep into a restoration of a fox 7up convertible I have so many wiring issues probably because the cars history showed it was in the hands of the DEA for a number of years and for sure thay are not known for being car enthusiasts. So I am sure thay made a mess. So my dilemma is now replacing the dash harness. My big question is are all dash harnesses on convertibles from 1990 to 1993 can be used. I have a line on a good harness from a 1991 that looks good but will it work Or do I need one from a 1990. The 1991 harness appears to have the same options.
 
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There were minor changes over the years. For the most part, the major wiring distinctions are 87-89 and 90-93. Within the 90-93 timeframe, some small wiring changes occurred around 92/93.

For the dash harness, I do not believe there is a difference between 90 and 91. Ideally it’s best to get same year harness but you should be ok with that harness