On a inline sbf is there a left or right piston. Deferent part #? Ordered 2 replacement pistons week and half ago, everthing on shelf cool. Call last friday to see where they are. Had to wait on rings but they went out that morning. Ok. Called back today and was told they tried to call me back to see if they were left or right bank. All 8the original pistons had the same part #. Did i miss something?