OTC 205060 Revolver Engine Adapter Plate for CAT Engine Caterpillar engines numbers 1673 1674 1693 3306 and 3406 in-line 6 cyl numbers 1100 3208 3408 V8 and 3406E Universal adapter assembly is required for mounting all plates to the stand The universal adapter plate assembly is included with 1750A Revolver Diesel Engine Stand