I'm getting close to completion on my first engine rebuild.  I'm trying to set up the timing using the original distributor following Tom Monroe's instructions and I have some questions.  He says: I must be dense because I just don't get what he's trying to tell me. If the the gap is already 0.5mm when the distributor is rotated all the way CCW, then what should it be when it "just begins to open"? More than 0.5mm or less?  This is my first time setting up a distributor so I'm thoroughly