No such animal as a 110F. It was made in 1963 so it's gotta be a 110E, which stands for "economy" so there probably isn't checkering on your stock, correct?

You could try a slip on recoil pad or if you want to swap stocks I'd go with a Boyds thumbhole. They're a bit heavier than the factory stock and come with a recoil pad installed already, plus it's a drop in 99% of the time. You'll have to order one in a long action/ blind mag.