hopefully someone can help a girl out. i want to know what i need to take from an 05 STi interior and put it into a 96 Brighton 1.8. do i need the heater core from the STi and the dash bar or will the stock Brighton dash bar and heater core work..? also what about the wiring for the hvac, dash and any other miscellanies electronic part, or would i need the harnesses merged...?