04 or 06 yz450f parts on a 06 wr450f?

I was wondering if a 04 yz top end including everything from the cylinder up will fit on my 06wr that came apart on me. any help would be awesome. also will a 06 yz head fit on the wr? thanks a bunch

04 yz will fit (all steel frame ) 06 head will not fit

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