It looks to me like you could add a link and move the wheel back further so you can fit a full orca between the tyre and seat tube, looks like you'd only get a fat dolphin in at the mo.
That frame is pretty sh't. Been thinking about that upgrade for a while. What difference would this make to riding? That is a proper track frame without space for a fat dolphin between the tyre and seat tube.
48/16 new setup