Let'* watch how we address each other please. Corrections/disagreeing can be done in a more polite way if we try.
Rockers are the topic at hand, the same principles apply to cam and rockers where springs are involved.
Changing the valve springs on a Series 2 motor is done for a few different reasons.
1. The added lift puts added stress on the stock springs and they have been known to break
2. The stock springs do not have as much pressure as the stock springs, this causes the valves to potentially stay open longer allowing for valve float.
3. When increasing lift, many people are looking for more performance. If the rpm is also increased in the programming the increased RPM have been known to cause stock springs to break and or have valve float.
Anytime you add a cam or rockers on a 3800 Series 2 motor, the safe choice is to change the springs.