The DVD they send you says and you can watch on the screen them actually repairing one step by step on how they do it with a narrator is not to do one then the next and so on, they say it weakens the block and you are drilling into some of the threads from the first pin, that is no problem but they want you to do that when there is another pin on the other side first for strength. Plus these pins threads pull into them selves they tell you instead of pushing out and spliting the metal. So they suggest every other one and then come back and fill them in, and a third pass if needed if you discover a leak when they are all in (I had to install one more in the middle of the row when I was done for a pin hole leak) The DVD and tech support person said every other so that is what I did, I suppose there are a number of ways they will work, but as long as the job gets done is all that matters to save the block. I only did one so not an expert by any means. BTW, if you get a chance check out the 3 foot hole in the cruise ship engine on their web site under "repair examples" or something like that, that they fixed with stiching pins saving the cruise millions replacing the engine. They have a string of pictures and I though it was cool looking at them. Good Luck to all with a cracked block. I am not a pro at all and if someone has a better way to do it then go for it. I just wanted to document my repair through pictures and the feeling that all is not lost just because you have a crack in the block. I felt lucky I found this method. Thanks to all the guys for all the help on my truck all along the way. That is the nice part of this web site all the help you can get from others.
John
