I would consider a 1960, 56" Kodiak extremely hard to find. Every 56" Kodiak I've seen has been rated at 26". And, several were very light weights. I believe you had to special order to get a longer Kodiak in less than 40# draw weight, but I don't know about the 56" ones. I have a '55 Kodiak 56" in 37#.
A few years back I found a 56-56-56 as well. (1956, 56", 56#).