Very possible I would think. Many items were dual sourced. The same block could be found on Corvette's also and through 1972. Should be many data points out there.
Interesting post on the subject... https://www.corvetteforum.com/forum...lock-carb-to-line-bracket.html#post1588143837
Yeah I guess...until I see a purple one! My brief review of the Corvette Forums on original appearing engines seemed to show about a 2:1 ratio black to bare brass and no silver ones. The brass ones did have the original stampings so fairly sure they were original.
not sure if this is directed to me but if so, I started a thread on the project progress folder (citrus green z28). I’ll be posting pics thru the restoration process.