Haha.. chase holes.

Anyways, I can see what the differences are by reading the descriptions, just getting some more insight.

I spoke with Viren on this in another thread, i thought I would take a screenshot of what Im looking at and see what everyone else thinks.

What tap should you use to clean out main/head bolt holes?

 

Use a bottoming chamfer tap. The holes in the block are blind holes, so this is best.