Replacing the timing chain and sprockets on my 97' 2.5 TJ. Somehow things got turned and now I can't get the sprockets to line up! What is the order of operation to make sure my timing is correct from this point? I can turn the crank shaft and I can turn the cam but I have no idea how to corilate the two correctly. The book has me doing things without there being anyway to get things exactly right. It says that you can double check the chain placement by putting the "camshaft sprocket timing mark at one o'clock, count the chain pins between the two timing marks - there must be 20 pins." How do I know exactly where one o'clock is?! You start with everything at top dead center and the rotate everything to line up the timing marks on the sprockets. How do I work backwards from there to get this thing back together??