While researching Hullett Chevrolet(since it's not far from me), this came up. A supposed LS6 M22 convertible that was also ordered at Hullett. Also Fathom Blue. Waskom is a tiny, tiny town. Population was less than 1500 in 1970.
https://www.mecum.com/lots/SC0514-18...6-convertible/
https://kennagelclassiccars.com/1970...s6-ss-4-speed/