I have a 60 Apache 10 with a 64-66 grill on it, and it fits. Like Big T mentioned you'll probably have to drill a couple of holes for it to fit. I'm converting mine back to the original 60 grill, I bought the truck with the 64 grill on it. The only problem I see is finding one, I bought a used one and am having it rechromed. I don't think they make a reproduction grill for a 60-61, but I'm not positive. So it could be a little costly.
Joe