The reason I changed the dowel pins on my new build is some of the pins had very little engagement into the caps especially the front cap. I was not comfortable with the limited engagement especially since this engine will be raced and will make over 650 HP. If you have adequate engagement and it's not a race engine you should be OK with the factory pins. On the other hand if you are building a new engine and plan to do a line hone anyhow these extra long pins are highly recommended.
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Tim Corcoran
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