I'm pretty certain the plugs in the dash side of the harness changed on the later fox cars. Things like the instrument panel, HVAC, signal stalks, etc.

If I'm reading this correctly, your dash and harness match, and you are going carbed? You should be fine then. The only wiring you need on a carbed motor is keyed power to the starter, keyed coil hot, tach, and alternator wiring. All of which can be pulled out of your harness, scrap the rest, and hook it up.