Tough to describe, but I run a stock rubber mount with a 1/4" thick plate about 3" wide and 7" long. Bent in the shape of a J the verticle length of the J is sloted so it slides between the k frame and the motor mount. The curved bottom of the J curves up and over behind the back of the motor mount. You toghten the stud to k frame which sandwiches the J upside down. The curve portion of the J is just big enough the motor can rock 1/4" and the J contacts the back of the mount. Been in there a decade.