How do you know if your springs are too strong for your fiberglass hood?

I had a AAR Cuda and if the car was in the sun all day the hood would bow up in the middle. after a while I just took the springs off and left it in the sun and the bow went away so I just left them off, If I was at a show or working on it I just put the springs back on because you could just pull them by hand they were that weak, but you can't do that with the A body's. I would just leave them off.