Based on the tag you showed on your other post CCX-3-3940 is most likely from 1995/1996 at contemporary but date on when the car was finished and title is unknown to me. My CCX-3-3967 is from 1996. Engine is FE family(390,427,428) not 429/460 series. I don't see your coil in the photo. Do you have an MSD 6AL control box?
https://www.summitracing.com/search?...20distributors
One resource for casting numbers can be found here.
https://www.erareplicas.com/427man/engine/partnums.htm
cylinder heads casting numbers should be found between the center 2 spark plugs.