I have started the process with Bring A Trailer. I have completed this truck for a friend that passed away and left it with a turned bearing to his widow. I completely redid the engine from a new forged crank, dished aluminum pistons by Diamond. bearings etc, and had it balanced. I then took it to Pax Power (owner is old Hennessy 2nd in command) and had them do the installation, tune and dyno check (March 22 2022).
It is a very low miles perfect example of a Gen1 (25000). The horsepower dyno'd at 647 (at the engine) with 6.5 boost. The block has been built to withstand 15lbs boost. The video is of this truck when Hennessy first started it up. It was a prototype that started as a 600 and was tuned to 810 HP.