Inner fender removal for weight reduction?

I ordered front and rear fiberglass bumpers. I think I'll refrain from cutting out the inner fenders for now. The front bumper with brackets and directionals weighed 33.6 pounds. The new bumpers are 4 pounds each. 66 Valiant.
Good to have the weight on the rear, I never ran fiberglass rear bumpers, only the fronts were acid dipped on the factory Hemi Darts...