I think it will fit, since vice versa the Hero blocks fit the Extreme. However the Hero will not have the waterblock pin connector that monitors temps, flow, and leaks. So you will be paying a lot of money but not have all the functionality.*
Omg jesus help me, I was curious and went and looked at how much it cost and the pain. $575+ when all is said and done, $400 is my upper limit for a board +monoblock and even at that point I'd need some serious convincing.
