Not positive here, but I think Chuck may have two Mustangs. One, if he still has it, he's had since at least 1998. It was a "LOU IV" nose art Mustang. The other is a fairly recent restoration that flies today as "Geraldine". It is an impeccable restoration and very WWII period accurate, following the current Warbird high-end resto trend.
He does also have a Duck, another phenomenal resto that was done by Wichita Air Service. It's also the earliest currently flyable Duck and the only one flying with the "speed ring" type cowl. There can't be many flyable Ducks left. As far as the other Grummans mentioned, I wouldn't be suprised if he has them all.
Here's some pics of "Geraldine" and the Duck...