no 1960 Grizzly you may get away with FF for a bit because the tip overlays in 1960 were made of fiberglass rather then paper.But again I would just stay with a flemish string or endless loop....better for your bow in the long run trust me.Eather one will work great on that Grizz.Dang it I just sold a 46# 59 Grizzly I completely restored plus I added fiberglass tip overlays to it.Nothing special but I will say this about those 59-60 grizzlys they are not rockets as far as speed goes.But they will stack arrows on top on eack other at 20 yards all day long great shooters and and and I should mention one of the quietest bows ever built period bd