56 Taskforce truck with 265 sbc standard as far as I know.I have this hub that I have taken off my crank with no bolt to secure it and the crank isnt drilled and tapped.What I want to do is replace the single groove pulley which was bolted to the hub, and replace it with a double groove pulley so I can add a belt to run the power steering pump I plan to fit.Can this be done or do I have to go another route? Thanks