23 or 18 spline?

@67_Slimer
You did that on the street?
With a Dart?
With like 255 street tires?
I wanna know more about your rear suspension!
And yes, your clutch is way outtawhack for street, for how you drive it. Something is gonna have to change.

But, Take a good look in your pile there for something that does not belong, like a foreign object. The only time I ever saw that, in hundreds of boxes I rebuilt in my younger years, is when a gear ate something that should not have been in the box.