How many Headgaskets have you destroyed?

I am on my first HG since the OEM blew out. I have a firering setup that Joe Hellmann got for me and it has held at a year of 50+psi without a single hiccup.
 
around 4? on one truck and 1 on another with one on the way?
 
Just walked in from installing one on my rig, man torq'ing that beast is a wippin'. So far this is the second one for me, changing it will help remind me to keep a better eye on my tune up.!. I did true it up and do a 3 angle valve job as well.
Ryan
 
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