Miss Olive is a 1954 Chevy Flatbed truck from New Mexico. You can see the inspiration photo and read more about Miss Olive on Instagram @mozarts_ride.
I found another demonstration by Ian Fennelly sketching an old truck. It was sponsored by Etchr Studio back in March and it can be found on YouTube if you want to watch it. This is my version of the photograph that he used.
Miss Ann is sporting whiskey barrels. You can see what photographer @mozarts_ride has to say about her here. His stories are always entertaining!