deck height:

[X-TECH MAN]

Originally Posted by art leong

I believe it was changed in 98 or 99.
I'm not sure but didn't the questionable rockers have the ratio stamped into them?

I believe the ones that were caught earlier this year were stamped but NHRA was aware of this trick for years when one of Warrens 350 Camaros was found to have Crane 1.6 rockers on it and using an undercut cam to make the lift check right. It changed the opening speed of the valves more than anything.