I think the priority needs to be a left handed (or at least a half back that can pass equally well from left to right)
Trueman plays on the left, same as Widdop and George Williams.
I have not studied Trueman or Williams enough to see if they would be equally as effective on the right.
Has anybody seen any York games recently? I would be interested to see how Riley Dean is getting on. I know last year he played on the right for us but would be good to know if that is his preferred side.