Rob,
A database (especially a public database) for 1969 Z28s would be difficult. Consider the numbers...
1969 COPO ZL1 package - 69
Yenko Camaros - several hundred
1967 Z28s - 602
1968 Z28s - 7,199
1969 Z28s - 20,302 (that's 9.8 percent of 1969 production, so about 1 in 10 were Z28s)