I ordered and received roller tip rockers from Showcars. the balls are 3/8" but the rockers are marked for 7/16"studs are the rocker arms the same for 3/8 and 7/16 studs with just different balls in each kit or do I have the wrong rocker arms and need to return them. The rockers are Comp Cam model # 1411-16 and the showcars part number on the box is 5460A that is listed in the catalog as 7/16 rocker arm set. Thank you in advance. Hoppe the Showcar Guys on this forum.