If someone can please help me with my 1995 mustang gt 5.0. I bought this car for 800 bucks hoping to fix it up. The speedometer and odometer both do not work, so i replaced the Vehicle Speed Sensor (VSS) and it did nothing, i even checked the wiring and it looked fine. Also if i am in neutral and i rev the car above 3000 rpms, the whole front of the car shakes, but i would also like to say i think it is straight piped because it is extremely loud outside the exhaust, and it also backfires if you rev it to 6000 rpms. So i don't know what that could be, if you could please let me know or give me some hints or stuff to check i would really appreciate it.