1960-1969 set of 12 heavy duty rocker arm balls: all right, there it is, now you can replace your worn out rocker arm stud balls, with these new ones and notice the difference. We use them in our own rides as well as for customers here at the shop, we are really satisfied with the performance. if you need less than a set, e-mail or call us at 918-753-2486. We also carry used rocker arms, rocker arm studs and push rods; call for price and availability.