Through the years I've tested quite a few bows with the intent of understanding precisely what design features result in either higher energy storage (SE/PDF) or higher dynamic efficiency (DE). Toward that end several years ago I tested '62, '64, and '66 Kodiaks. Of course the '66 Kodiak is the same bow as the SK's and therefore I believe this test data will answer your question.
With all three 60" bows set at an 8" BH the SE/PDF's at 30" were:
'62 = .927
'64 = .926
'66 = .925
I also tested a McCullough '59-er (a slightly-redesigned '59 Kodiak) and it had an SE/PDF (@8"BH) an SE/PDF (@30") of .945
I also tested an E. B. Holcolmb '59 reproduction (a faithful reproduction of the original) and it had (@8" BH) an SE/PDF (@30") of .949
Both '59 reproduction/redesigns were within a gnat's whisker of two 60" original '59's that I had also tested. Pre-'59 Kodiaks fall off a bit in performance so I essentially start defining "modern" Kodiak designs as beginning with the '59.
All of these bows with a dacron string set up as above tested within a couple fps of one another, or around 185 fps when shot with a (precisely) 9 grains per pound arrow drawn to (precisely) 30" AMO (28 1/4" from the nock to the throat of the grip).
Most modern 60" one-piece recurves made with fiberglass and using a dacron string will shoot in the 185-195 fps range when shooting (precisely) a 9 gpp arrow and when drawn (precisely) to 30" AMO and all when shot out of a shooting machine.
A true, precisely-measured 5 fps difference between two bows doesn't sound like much but consider this. Five fps difference is about what we all experience when we short-draw our bows by 1". Ever notice the difference in arrow trajectory after short-drawing 1" and shooting at a 20-yard target? A true 5 fps difference in performance between bows is huge.
With that said you could hunt effectively and successfully for the rest of your life using a SK with dacron string. The journey is what it's all about - not the destination!