ok try, tube service in fremont california. then use a piston honing tool and a 5 gal bucket full of tranmission fluid to hone out the internal. then have the diameter to fit the shims. then have the "stubbs" heli-arced in. i belive the dolphin stiker should be at 8 degrees. not easy but been done, works perfect. PM me for complete details. been done, have the materials for anther set. this wont raise the rear beam. but they will be round and solid. sc20 tr