You could put a dual crown on anything with the proper headset (in this case to adapt to a tapered headtube). The real question is will it void the warranty? Is the bike designed for and can the headtube junction handle an extra 40mm travel? Will the slacker headtube angle make the handling all wonky? That dramatic of a fork change without a travel increase in back will likely make everything worse rather than better in my experience. I personally wouldn't do it.
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