Piston ring question easy
You could run it and check the oil consumption... it usually will go up considerably if there is a 2nd ring problem. You have a 50/50 shot.....
Got a ring PN? If it is E178K for a 318, then the 2nd ring has a bevel on the inner edge and a taper on the outer face so will have a definite 'up':
Federal-Mogul Motorparts