the 3.0 V6 from 2007 had hydraulically adjusted exhaust valves and manually set intake valves that change profile at 3600rpm, actuated by oil pressure running to the cams (that's the best explanation without getting the technical manual out) - now even though there are divits in the piston heads, I found that the valves only contacted the piston on the intakes (and bent them of course) - lucky for me, it was only the front bank as I mis-timed the belt during installation (I swear, the original belt was in such good condition that I never should have touched it and waited another 50k miles), I am not sure how your belt snapped at only 65k miles, I guess could just be age? or extreme climate leaking under the covers?

anyway, it took me three months of evening and weekends to tear the engine down to the pistons and reassemble, it's not overly difficult but they have a lot of interesting procedures in the rebuild process and there are a number of special tools involved (I fabricated a few of mine and used some generic tools from Amazon)

So I guess a new engine would be the quickest and easiest way, but much more expensive than the $600 I spent on parts, gaskets and tools - plus I have an extra car to drive, so there was no real rush

Good luck