Thanks for your insight on the differences between the two. I am aware that the C6 Z06 does have the issue with the heads. I have the replacement cost in my budget if it hasn’t been done.
I had a chance to drive a 2007 Z06 recently and I was very impressed with the LS7 motor. It had incredible power. The acceleration and the rawness of the car is very impressive. The handling is also amazing. My last car was a 2012 Challenger SRT8 6spd. It felt like a boat compared to the Z.
My next step will be to test drive a C7 GS 7spd. I really like the interior styling and technology of the C7 over the C6. But prefer the exterior styling of the C6.