CKT has only one use.
1972 Camaro Z28 with a turbo 400 trans 255hp 350 Vin L with a Holley carb
346249 intake is a Q jet from 1975-77 305/350/400

The only thing you can assume is a Z-28 is the block stamping....sounds like
everything else is a mishmash of stuff.

Get the head casting number and I can decode it