This is a big car fan shroud but will fit A body with 455. The diameter is approximately 22". No cracks, shroud is in great shape. Can deliver to the GS Nats. $85 or best offer.
I will measure tonight but I can tell you it will fit in an A body correctly (lower end mounts in the core support tabs, the upper tabs use the same mouting holes at any other fan shroud, ie, 70 BB, 71-72 BB shrouds, I've run them all). I did run this shroud many years ago for a short while.
So it sounds like you still have it for sale then. Would you be willing to ship it? And if so, how much?