k10 micra

hi all, I am in the process of building a junior rod for the new stock car
season at my local track, its a k10 1.0L micra what i was wondering does a
1.2L gearbox fit and what should i be looking for with ref. to the casing no.
and what year or model did the 1.2 gearbox come in?

THANKS
 
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