Hooker to Magnum head problem! HELP PLEASE!

I just got my Hooker Comp headers yesterday and I think I have a serious problem - the flanges will only get 2-3 bolts lined up at the same time. I'm relatively sure it's not the head surface because I have a set of Dakota shorty headers that fit fine. The issue that I have before calling Summit and returning them, is that the shorty headers are for a Magnum engine, while the Hookers are for the LA-style heads. I was always told the exhaust patterns were the same, but never had it verified. Should I be sending these Hookers back?