I agree with Cobroller. M &amp; w set were always a different bore than standard and that is why I asked you to measure them up. When I worked in the machine shop part my dealer friend needed one sleeve for one about 10 years ago. He had a used 3-1/2 inch bore Oliver sleeve so we bored it to 3.5625. So if your sleeves are not round or straight that may be a cure. Another thing get yourself a good ring catalog once you measure up yours. You may be surprissed to see what options you have.