Yep, Thats the Greyhound. At the local museum by me, they have an M-8 Greyhound and drive it up and down the road next to the museum sometimes for fundraisers. They have really cool Armored vehicles and planes.
Edit: Sorry, they use their M20 up and down the road, not the M-8 xD
Oh, They recently acquired a PBY Catalina from (I forgot where). It was so old and out of shape that they were lucky the wings didn't fly off of it when they brought it to the museum. Now its completely apart and is being fully restored :D