How are today’s as/ah cars different

Believe it or not it started with the valve springs. Then it was the valve train couldn't keep up so you got the Jessel and T&D rockers and then data came in. It was just a progression as some of the rules loosen up. I'm not all that up to date on the AH cars but the AA cars started out in the day making about 600-700 hp and now about 1,200 hp. And think that's from 430 c.i. Also a ton of research as some of these guys have been racing in this class for over 50 years. There's more but you have to start somewhere.