the Riverside Raceway pace car, an original 1970 Trans-Am Javelin, was auctioned off in 1986, and here it is

A number of the pace car modifications performed by RIR were left untouched after Terry purchased it, including Stewart-Warner gauges, a trunk-mounted battery, an external oil cooler, an external twin-oil-filter system, and a custom red taillight that replaced the white reverse light.

https://www.hotrod.com/articles/unrestored-1970-amc-trans-am-javelin-served-as-riverside-raceway-pace-car/