i need a dash harness for a 90 trans am tpi car.

I have a dash harness for a 1989 .. I believe there is no difference between a tbi and tpi dash harness.. $120?? shipped

i have an 89 tbi harness,there are differences in the bulkhead connectors,and i'm pretty sure 89 uses a 165 computer and 90 uses a 730.