[Dave Noll]

In your example, you used a SBC with .410 net lift & I assume thats what the spec sheet calls for @ the valve. If so, why is there a slippery slope with changing pushrod length to get .418 lift @ the valve. Its over spec. I understand whats being said about different angles affecting lift. Was this some older school stuff trying to get more from the stock rocker before the rollers were legal ? Just asking.