Might not be the worst idea in the world. Chief made a living off of converting safeties and RB's into linebackers.
it's really not. not exactly an apples to apples comparison here, but Thomas Davis played Safety at GA, and has had an outstanding career at a LB in Carolina.
if the body type, speed etc...align, it can work.
It may have been Fulmer that said it but it was once said, to get the most athleticism on the field, convert CB's to safeties, safeties to LB's, LB's to DE's, DE's to DT's, DT's to O-tackles, and O-tackles to guards.