Pretty interesting thread and a very good link to the Cam Timing vs. Compression Analysis article. This was very readable.

One of the comments in the linked article hit it right on the head,
"To sum up - DCR a useful tool, but widely perceived to be of greater worth than can be supported by physics".

It was interesting to see how much variation there was between contributors for the idea of a safe? clearance between piston and head.

As mentioned previously in this sites thread, current technology allows the piston to kiss the head in race engines depending on head and piston design. The builders manage to keep them reliable by making the squish area larger and chamber smaller (within limits) to increase the shocker effect and increase burn speed.

The shock absorber effect means that the rate of resistance to movement of the gases (between piston and squish area) rises exponentially as the distance decreases between piston and head, if both suraces are parallel. It is this factor that allows the piston to kiss the carbon without doing damage.

I will watch that Mopar site in the future even though I dont know anything about the engines. Looks like some good tech stuff there occasionally.