This is a big deal. Without new blocks IMO the small block mopar was close to end of life.

There is speculation that this will spur the development of more cylinder heads but that is just that, speculation.

I would be surprised if Dart accepts orders until they are ready to ship finished parts but I get surprised a lot.

Mr. Book builds some pretty potent engines. He has been breaking R blocks with fast NA engines in Australian Pro Stock and Comp Eliminator.