Who's running NGK ZFR5N in there Slant?

Well, I liked my NGK ZFR5N plugs, no complaints after 5 years running, inspected good and lasted, but we all have different conditions and set up's on our timing and plug wires.
I was told they are the plug for my 170 by one of our slant tech members, so I went with his direction he told me.

Tim Morlin Visit 7 22 2010 017.jpg