I personally don't have any results but do your own research. Since I was building my motor and it was out, it was a no brainier for me. Also I'm building my car for Big power. I have the best of the best so I didn't want to take any more chances after going through 2 coyote blocks in less then...
Bluesnake is correct. They revised the block in 13.
MMR has a head cooling mod. Just have to be careful as they have a different mod for Auto VS Manual. I have one on my car. :thumb2: