1974 Dart Swinger

You cold get a threaded collar and piece of threaded rod, thread a nut onto the existing carb to filter bolt, then the collar - locking the nut to the collar, then the piece of threaded rod into the collar locked by another nut and trim to length needed to place the wing nut on. Be careful it doesn't hit the underside of the hood. Or, see if you can remove the existing cab bolt from the mount and replace with a bolt locked in place by a nut between the mount and the bottom of the bolt.