Anybody every play with or run a 576 head

Looks like the rule actually changed farther back than I thought.
Like 2007/2008.

A few discussions about it over on class racer.......like this one:
Stock Valve Job - CLASS RACER FORUM
Post #8....... by a pretty well renowned Stock racer, many many time record setter, and Stock engine builder.

East Coast Drag Racing Hall of Fame