If they're aucuba, they will grow almost anywhere. Also, it might be easier to cut some branches and root them to make your own bushes. They root in water very easily.

Yes, aucuba are tough and will grow almost anywhere, as carolinakate said. BUT, if they receive much more sun in their new position than they're used to, the leaves may scorch and turn black. Not ALL the leaves, but ones which take the brunt of the extra sunlight. They are easy to transplant. Just make sure you get enough of the root ball and water well once they're in the ground. My mother gave me 4 of her aucuba shrubs that were roughly the same size that you mentioned - 4x3. They transplanted soooo easily and they're currently growing like gangbusters! Enjoy.