I can’t machine the splines on the arm. I’d have a go at the splines in the shaft, that’s easier. But the internal splines, and they are proud, not recessed. Is way beyond me.
I have spare cross shaft. I suppose I could do away with the spline method and make new arm to fit that, maybe keyed. Cutting a keyway in the shaft is possible. Clocking it right is a matter of being careful. That’s something I’m bad at :-)

Alistair 
> On May 24, 2021, at 1:56 PM, Neil <musomuso@gmail.com> wrote:
> 
> 
>> 
>> Otherwise it’s a weld up and remachine. I suppose that’s possible but not my
>> dream option :-)
> 
> but but but, you could re index the arm? Better than "new" !
> 
> Neil.
> 
>> On 5/24/21, Alistair Bell <albell@shaw.ca> wrote:
>> 
>> Yes, cracked at the edge of the spline section. Along one spline root.
> 
>> Otherwise it’s a weld up and remachine. I suppose that’s possible but not my
>> dream option :-)
> 
>>> On May 24, 2021, at 1:15 PM, Neil <musomuso@gmail.com> wrote:
> 
>>> ..... did the lever crack where arm forms to circle?
> 
> 
> 
> -- 
> Neil n
> 
> VE7TBN
> 
> 1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt
> 
> 1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8
> 
> VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>