MSD distributor tuning

So, I had both weights off when I changed the bushing and they move freely. I bought a new adjustable timing light for this to check against my old, non-adjustable one and both read the same. I revved the motor pretty high and would not go past 30* . The distributor is relatively new <5000 miles on it. I think it
Is the springs, but I do have a set of weights that I can swap if needed if changing to lighter springs do not help.
The 8388 RTR distributor is shipped with 2 heavy silver springs. That is the slowest curve possible. The engine would likely have to go to 4000 rpm with the blue bushing.

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