Unlike David and Strife, I disagree 100% with the percieved need to remove the rocker arms. Yes, it may become an issue if your chain skips a link; however, if you simply roll back the engine while keeping the cam in the same place, and moving a link back, then you will be fine. I rolled my timing chain in (by myself) in slightly over an hour including all the pictures I took for my DIY article. You do NEED to secure the new chain to the cam sprocket via vise-grips or cable ties. I prefer vise-grips, others prefer cable ties (as Mike said).