800 Dragon Crank in 600 HO?

[Boston Racing]

Does anybody know if the cranks are the same dimensions aside from the stroke difference?

 

[Rick!]

The 800 crank has mongo bearings on the PTO and MAG ends which kinda makes it only fit CFI cases. There is also a 5mm change in the PTO end but that only pushes the clutch out a bit.

 

[Boston Racing]

So If I want a 70mm stroke I am going to have to get the stocker stroked? Is there any other crank options for this motor?