I think THIS is the tank you are looking for.....
It has a smoother top, as opposed to the one used on 427/428 Cobras that had a higher top with ribs in it.
I believe the smooth top one came from earlier T'Birds & Lincolns (like around '61-'62 models), as opposed to the ribbed big-block one from mid-sixties model T'Bird & Lincolns.
regards,
cobrajeff