At 60", you won't be using a 10" brace height. More like an 8" to 8 1/2"...you will need to see what works best for you. The later Herter's bows were measured from tip to tip, rather than from string nock to string nock like AMO bows. So you may want to run a tape across the belly from notch to notch to see if this one is the same. If it is you may come up with 58", and that would be an AMO length.
Bob Barrie designed the shelf to peak for better arrow clearance; Bob was the bowyer for Herter's, and later went on to form Rocky Mountain Razor broadheads. The Herter's made a lot of nice bows, but the one you have makes a really nice hunter; not as blocky as the Sitka and Sambar models that served as their flagship bows in the 60's.