I've been wanting to build a IHRA pure stocker for years. But it seems that I'm always building new homes, remodeling a home, moving and or changing jobs. Stocker/cheater cam, headers with high flow mufflers look like a do-able way to run the softer indexes. Stock spec valve spring is a weak spot for some set- ups imo. Lack of notched pistons could be a problem for some set-ups also. Some day, maybe some day, I'll get time to run some thing.