I have a 1990 GT with 1994 GT power seats. The motor on the drivers seat track has become weak and when bolted down tight and put in a bind or under load it will not move. I can get a great deal on a 2003 Mustang Power seat. However once I buy I own it and just want to make sure my asumption is correct....that....All mustangs from 1979 - 2004 use the same mounting pattern on the seats and same floor height????? Any info is much appreciated.