The driver in my group has Good in a Clinch, switching Under Fire's stat from Cool to Sharp. She also has No Shit Driver, which allows her to add her car's power to her Under Fire rolls. All seemed clear with this playbook, until I stumbled across the following in the full rulebook on page 223:

Drivers get to add their cars’ stats to most of their basic moves — notably excluding the ones that call for a roll+sharp or a roll+weird — but not to any of their special moves[emphasis mine].

From how I read it, this means that car stats can't be added to Good in a Clinch. Has there been clarification on this? I feel like that's a rather major caveat to not include in the playbook itself.