[blykins]

Very doubtful.

For one, you probably don't have exactly .608" lift. With pushrod deflection, valvetrain geometry, etc., you prob have more like .590" at the valve.

Also, the spring data is based on coil bind clearance. Most springs are rated at around .060" coil bind clearance. You can effectively run .050-.055".

However, I would be rolling the engine over and seeing now much coil bind clearance you have, how much retainer to valve seal clearance, etc.

How many broken springs did they find?