Thierry is correct. The motor mounts are entirely different. Don't go by what someone tells you about what used to be in that car. Look at the differential. If it is an 8", then it was indeed a V8 car at one time. If it is a 7.4 inch, then it is and has always been a 6 banger. Look at your VIN. If it is a T code, then it is a 6 banger. If it is a C or A code, then it used to be a V8. The code for the engine is the 5th digit of the warranty number. That tag on the door, plus the VIN under the hood on the driver's side on the top of the inner fender is where your VIN is located on 65-67 cars. 68-73 found the number also on the driver's side dash.