Those Springs are actually rather wimpy.
I don't think I would remove them and operate the peddle. It's a [Edited by Moparts - Family Friendly Site - Keep it clean] when your gas peddle sticks open at high rpm.
First I should mention Im using the correct Linkage on the Hemi but the edelbroke one should be fine also.
I Had a similar problem the other day with the Hemi Coronet.
I had some help from a buddy of mine the other day.
Try starting the car, get out of the seat and operate the cable with your hand and see if you have a smooth transition without using the gas peddle.
As goofy as it sounds it turned out the neighbor must have mashed the peddle hard as he climbed his fat behind out of the driver seat and bent the arm the comes of the peddle that connects to the cable and it was no longer lined up correctly.
Same issue you are having.
Like I said my car is an older B Body and I am not sure if the E body is the same but it is exactly what turned out to be my problem.
Hope this helps.