Inner fender removal for weight reduction?
You need aprons(inner fenders) or solid structural support(j bars?)to fire wall or better yet to a full cage. Since you compromised the structural integrity of the apron’s with holes for fenderwell headers, the only choice now is obvious. All you are doing to lose weight by compromising structural integrity is actually slowing your car down and to say the least making it dangerous and unsafe. It won’t be long before you fatigue what’s left of your car.
Want to go faster? More horsepower and a reinforced chassis and full cage and more weight.