Is your film associated with SAG or any of the "Guild's"? If not, do whatever you want. Now's the time to experiment and have the freedom to express yourself, even in your titles and credits. For the feature we're working on we'll probably have more "thank you's" in the credits then cast and crew! And check out Napoleon Dynamite, they listed all their extra's (imagine if they did that for Gandhi.)
production managers sometimes like a full card.. but its really whatever you want, but top people like to be up near the top, and check contracts, if its in the contract and you signed it you should do it.