RB's Split Out as WR

I have noticed that RB's all seem to have a "1" for position skill for WR. I want to split out my RB who has good pass-catching skills on certain formations because he is better than my 3rd WR. I'm thinking of players like Marshall Faulk that used to get split out wide like WR's. Will he fail miserably? If so, can we change that? Should I put this in the request for future upgrade section?