Yes, it is 1964 for sure. At 66", it is the most common length of the three different lengths of the 1964 Kodiak Specials. The 150 to 250 range depending on condition is realistic for this year and length bow.
It appears to be in very nice condition except the small scratch you point out. The "+" stamp you show over the serial number should not effect the desirability nor value of the bow for a knowledgeable collector.
With no holes, no vertical stress cracks in the glass it looks like a nice bow for the collector/shooter.