I called wayne about 5 months ago and left a message, they called back about 30 minutes later and were real nice, he talked to me for 25-30 minutes, said a 261 with their head would make at least 1 hp per cubic inch, but 300 hp is easy to acheive, he took my address but I never got the catalog, he also told me that he just sold a 302 head to a guy here in my town of redding, ca. but he told me that they were open for business, happy hunting!