I have no idea how many they need but if the flying at DL goes well then they will continue to hire IMHO. I do not know this for a fact and it is only my opinion, but I really would tend to think that at GJ 750 hours is a pretty hard number. I do think GJ is a great place to be right now and I LOVE working here but at GJ they are black and white there is no middle ground. If you can follow the rules here you will succeed and be happy. If you showed up with 749 hours it would not surprise me if they told you to come back when you got that extra hour. But in their defense they have to draw the line somewhere. The only thing I can say is send in your resume and if you get a call well then they know how much time you have. Also even if you do not have the time send in a resume as it gets your name out there and shows interest.