Question Engine suffix

[1971Z28RS]

Hello all
Would any corvette experts know which car would have a engine with this suffix

 

[Rruuff Day]

Hello all
Would any corvette experts know which car would have a engine with this suffix

This may not be exact but it's as close as I can come
V = Flint, Michigan Motor
0910 = September 10
CKZ = L48 engine...(350)
The C had some reference to 1977 but not sure on that one...