According to VW the gas one is 298mm, diesel 287mm.

I cut off more like 13mm. I also put a slight bevel on the end so it
will line up easier as it goes into the pilot bearing in the crank.

Mark

Keith Hughes wrote:
>   Date:    Thu, 19 Dec 2013 00:25:54 -0500
>   From:    Karl Mullendore <tdiguru@WESTYVENTURES.COM>
>   Subject: Re: Diesel input shaft
>
>   Any waterboxer input shaft will work, after the end is
>   trimmed by 10mm length.
>
>   Thanks Karl,
>
> I was not sure of the length that needed trimmed, and had none for comparison.  You're sure 10mm is the Magic Number?
>
>
> Keith Hughes
> '86 Westy Tiico (Marvin)
>