Hmmm. Did some quick measuring and weighing myself of the oem (1978) rockers and these Melling replacements. The widths of both versions I have are all within a similar range as they do vary some but it is small, the Mellings are beefier overall, thicker stampings and therefore weigh a little more. (139g to the oem 121g) How wide are those MP’s on average ? (taking readings with a dial caliper from where they contact each other)