4 speed tunnel position question

Hey Trudy;if it is a factory or AMD it will almost center itself.If your car is on a fairly level spot you can use a level to get it close.When you have it placed where you want it take a sharpie and trace the outside of it,pull it off make another mark 3/4" inside the trace mark,this is where you cut the floor.Understand the workers that built these cars were not rocket scientists.I know a bunch of the guys from Chrysler in Fenton-great guys but the stories they tell?????