Leave it ling and heat treat it well and itll work fine. I made a couple long narrow hickory bows that shoot well with little set, about 1. They are both about 70 long between the nocks, bend through the handle, and 1 3/8 wide. One pulls 75# at 27 and the other pulls 70# at 29. So at 1 1/4 wide Id imagine up to 60# is definitely doable. And heat treat it deeply while your at it.
Kyle