Try this of my BBC in the spring. It was only the 3rd pull on it and was still too lean. Dyno had no fresh air for carb and I had headers open in cell. Motor made an extremely flat curve of 1,010 hp @6000-6500 and 890 lbs of tq @5200-5600. Computer dyno software now says it's pushing 1,150 hp for ET and weight.