AFAIK the main point when offset grinding is teh amount of overlap of the big and and crank journal - i.e. the diameters must overlap when viewed from one end.

I havent seen much stuff on dtnamic balancing so have no clue, but agaian Falicon say they can do it but I have no expereince of their services.

You might also need to make the crank groove bigger to clear the rod, so this could need some welding etc before machining.

Go for it!
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NSRless again...