Dodge to NASCAR?
As for new Hemi's, yes they are technically advanced but not materially. Any new hemi that was suitable for endurance racing would be so far away from what the factory produces it would be out range for public projects. They just aren't up to it as the old hemis or any other production were. They used to have a mind set to build it to last but now it is to build it to sell and when it breaks get rid of it and buy a replacement, recycle the old broken stuff to make new junk. It's a fact that aluminum can't handle heat like iron can and engines get hot sometimes and then they're done. Valve seats fall out and gaskets sink into the heads, coolant leaks are a problem and plastic has no place in so many applications. With so much plastic being used in new production parts, it's no wonder the sport is losing ground. Engines just are built to last and operate in conditions of racing.