If you're going to make big power you need good parts, that's obvious. The number of 1000+HP BB Mopar's are few. Therefore not a big demand. It always cracks me up that Mopar guys are "Cheap". We pay more for most of the parts we purchase. Without good blocks and good heads that are readily available there isn't much market for cranks. With cost of a motor in this range going north of 25K makes it tough for the average working man to afford.
Doug