all i can say from personal exp is that when you go to meps. get what you want!
i screwed myself over casue i was in a rush to get in. they wouldnt let me go infantry cause my score was high so i said f it and just got a signal mos right now and will have to reclass and go 11b and back to benning. so if they try to do anything like oh we cant do that, then just say ok ill be back next time and more than likely youll get them to stop acting like fools