06 WR in 08 YZ frame

Hey guys, I'm kinda new here.. I've been searching for a couple of days now and haven't found anything.
I was wondering if it's possible to put a 2006 WR450 (steel frame) engine in a 2006-2009 Yz450 frame ( aluminum frame).
The biggest issue i can see is the steel frame has oil in the frame unlike the aluminium .. is there a way around this?
 

I don't think it fits, and you would have to add an oil tank

Unfortunately it doesn't fit. I bought newer cases for my 06 Wr and same fitmit issues. Are you interested in selling your motor? Because I am in need of one?

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