Bob,
Was this an off the shelf or custom and is that the Overall size.
Looked thru their catalog and on the phone with Griffin now, Any chance you've got a part # on your 28 x 19 Rad was this one of their $400 or $800 Rads.
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Not custom , bought it from Summit , via ebay , wasn't near as hi as they are now . I really don't remember its been so long, seems like around $200ish back when I bought it, it`s about 7-8 yrs old. Typical griffin ford/mopar crossflow , even bought the shroud for it later, but have totally reworked the shroud about 5 times experimenting with diff fan set ups. never have noticed a part # on it tho .