I added the spring to my diaphragm equipped Ebody. Cut down considerably effort to depress and hold down. Love it, makes the car civilized to drive for once.

Never does pedal stick to floor even at 6k rpm. It's all in proper adjustment for me

I posted a thread sometime back how to stretch and maintain spring so as to get the spring installed. With photos using a floor jack as an aid.

Shooting some lubricant on spring and washers will help to remove them