I got a slight surprise as I took my new timing chain from Summit out of the box... no timing marks as it shows in the book and as I had remembered from earlier work.  The shop manual shows the gears and chain very clear and expanded, I counted the links that were between the marks, it was seven, marked the chain with a pen and proceeded to install it just fine and with # one piston at the top, the gears and my chain marks looked exactly as it looks in the book, I know it's correct.  This is also a good time to put the distributor in, get those gears in the right place.