la block 771 hp N/a wins dyno challenge

Here is the company that built the block. You have to scroll down the page and click on the blog tab.

Valley Performance & Machine Service – High quality and precision engine machining.
Also at the contest he was limited to 7500 rpm. At his shop running the engine to 8500 he has made over 800 HP on his Dyno. There is a member on here that is Friends with him.