Timing Chain Tensioner 318/360

Well, my '99 V-6 Dakota has 150,000 miles now and my son's has 200,000. No noise that I can hear from the timing chains.
As far as "beating it to death", since the pressure is constant to keep the chain tight, I don't think there is any "beating" being done.
I did put one on my 318 in the Duster. I plan for a long, happy, relationship with it...
C