I know a lot of guys who have ran the 1008 on pretty stout small blocks and never had a issue. How many guys actually measure everything needed to accurately figure the the compression ratio? I don't have a clue, I can only speak for my self. My small block just ran 10.008 at almost 135 mph on pump 93 and 3300 pounds. My engine is five years old, maybe I need to check if my Fel-Pro's failed?