The' Spirit of America' cars were RPO Z51 and included more of a package than the 'All American' cars.
I asked about the All American cars here a few years back and someone noted they were dealer installed also knew of a loose kit.
https://www.yenko.net/ubbthreads/ubbt...;Number=260964
Although cool and uncommon, being for appearance and not performance doesn't help a lot w/ desirability also if done at the dealer level unless solidly documented could've been added to any Nova in later years.
[img]<<GRAEMLIN_URL>>/beers.gif[/img]
~ Pete