Gray Ghost is finally back to racing, having been restored to at the Monterey Motorsports:

In the 66-72 Trans-Am race group, the Tempest started in 10th place out of 38 cars, and finished 6th.

At Monterey, the Gray Ghost was equipped with a unique exhaust system that featuring long “lake pipes” that run from the header collectors, below, under the rear axle to the rear bumper. This system is a replica of one used in-period, designed to give the engine the longest possible collector pipe. The SCCA took umbrage, alleging competitors’ complaints, and the system returned to a more conventional side exit exhaust.

http://www.carguychronicles.com/2016/08/64-tempest-gray-ghost-rides-again.html

Thanks to Harry for the news and photos!