What springs come on eddy performer RPM heads

like that erson 14 degrees bigger than the Crane and measured the same way
or the comp 268 is a toss
Compare with the lunati or Howards which are over 10 degrees shorter than the comp and almost 15 degrees shorter than the Crane - if adjusted for measureing differences
now look at the lift
The erson must have been designed for stock early heads with stockish springs
only .450 lift for a 290 degree cam good choice if you really want to kill your torque
I would think both the Lunati or the Howards would give you more area under the curve and both for sure will build more dynamic compression