Quote Originally Posted by techinspector1 View Post
It's not the block that gets drilled, it's the heads. Did you look at the link I provided for you?
No sorry haven't had time. Here are my compression numbers...

#1 = 175 psi, 3 = 150, 5 = 140, 7 = 170

#2 = 142 psi, 4 = 168, 6 = 166, 8 = 157

#4 is the one that water flows out of. 1, 6, and 7 only have a little when I turn it over.

The heads were done by a machine shop before I got this mess. I can only assume that they are fine.