I am looking for any suggestions for the correct differential to install in my 1983 280zx non turbo. I have installed an LS1 out of a GTO and I am using the six speed transmission also. I am not sure what rear end is currently in he car. How can I tell, and what does anyone recommend to use so ruin the drivetrain?? I was going to modify the underneath and use the GTO rear end but then I have to drop another $1500 for custom axles. Any help would be greatly appreciated.