That picture is of the 2nd production ACR (Ralph Gilles has number 1). It was driven in the 2008 Cannonball One Lap of America by Chris (Weaver?), the same SRT engineer that set the Laguna Seca track record in the ACR. I also competed in the 2008 One Lap with my 06 FE. Mine also has a trailer hitch and I towed an Aluma KLM trailer. My hitch was installed by Ron Adee of the IL VCA. Ron owns a machine shop outside of Chicago, Valley Tool. Chris' hitch on the ACR was installed in Texas somewhere. I remember reading the sticker on the hitch but for the life of me I can't remember the name. The car was slightly breathed on by Hennessey (it didn't appear he screwed it up at all) and I believe that is when the hitch was installed. The car was entered by Dodge in the One Lap along with a prototype Challenger driven by Erich Heuschle (a Viper vehicle dynamics engineer) and Ralph Gilles.
Here are pics of my hitch and trailer.
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