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Kelob....IIRC my springs are right in the same range as yours and they were also from Scott, same ones I ran on my 508 252/258 roller that was in the car before the new motor.

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I was told by Comp Cams to not run more than 400 lbs open on thier hydraulic roller lifters I set the seat pressure right at 200 lbs which made 395 to 405 lbs open, I hope they don't find out I cheated by 5 lbs open That was on a new 426 Street Hemi World block street motor, it seems to rev good and no valve float yet up to 6500 rpm, where the owner wants to shift it at