Product Description Product Reviews OTC 206629 Mack Engine Adapter Plate You can order only those plates you need for the engines you work on. The universal adapter assembly is required for mounting all plates to the stand. No. 206629* – For Mack engines: V8 1000, E6, & E7 in-line 6 cylinder Wt., 42 lbs., 13 oz. * NOTE: Must be used with No. 205061 universal adapter plate assembly. Each engine mounting plate includes all the necessary hardware and an engine application chart.