76mm LS, 2 holesStroke: 57mm Bolt Center: 120.7mm Port thread: M16*1.5 1/4"NPT 1/4"NPT Bolt Thread: M16*1.5 M16*1.5 5/8"UNC Push Rod: M16*1.5 M16*1.5 5/8"UNF Total Push Rod Length:285mm