1981 would be the correct date for your Model 60 Glenfield rifle. But, the Model 60 Glenfield was made up to 1982, and the Glenfield name used on other guns to 1983.
Sorry, I cannot help about the scope. Guns in my collection generally do not get past the date of 1930.
I am sure someone here will be willing to give you some help on that subject...........
Due to the increasing cost of ammunition, there be no warning shot!
The growing federal deficit = generational slavery to the national debt.