I have a giant boulder mountain bike, and I do have a fair knowledge of bikes but I know nothing about headsets, my mate had a bike come in to his work shop that had been in a car crash only the back end of the bike got crushed, so he gave me the forks. They are rock shocks duke xc u*-turns. I put have put them on my bike but they don't fit in to the headset, I know that the forks need a 1 1/8" headset. So can I just buy a headset and stick it on my bike or do I have to get the right angles and stuff like that?