As far as the exhaust hangers go, there are two things to look for if you want to determine if its a factory dual exhaust (225 or 271 horse) car, which all GT's were. There are a pair of exhaust hanger support plates that the mufflers attach to, spot welded to the floor pan under the rear seat - you will need to pull out the seat to check for these. You will also see a 1" x 3" plate with two bolts sticking thru this support plate to the bottom side of the car - this is what the actual muffler hanger bolts to. The other clue to look for is the frame rail plates. When you are lying under the rear of the car, look up at the rear frame rail that runs along the passenger side of the car, next to the fuel tank. About 5" forward of the spring shackle there should be a 3/4" hole. If you stick your finger about 1/2" in the hole you will feel a steel plate blocking you finger. These plates were factory installed to support the the rear dual exhaust hanger.
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1965 K code coupe - numbers matching - restoration ongoing. 1987 LX notch, 5 spd, stock heads (minor porting) and intake, 65mmTB, 3.55's, ram air, pulleys, shorty's, 2.5" exhaust with cats 13.89@100.25
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