ih np205 input spline

The output is 32 spline
the input is 10 spline.
You can replace the input with another shaft
that is what I did.
 
You will like your doubler & wish you did it sooner.

I'm not sure about the output/set up on your truck, but I'd recommend a 241/205 over a 203/205.

Lower total (5.4:1 vs 4:1), plus an extra gear option: 2:1, 2.7:1, & 5.4:1.
 
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