The oil hole partially hidden by the hub is '74-later. If there is a thrust washer between the input and output shafts, it's not common for the output pilot shaft to peen over...this usually occurs when the fiber washer breaks and allows the pilot to travel too deep into the input. Does your front clutch piston retainer take the 3-tab thrust washer like in the pic below? If so, two thrust washers were used, one thicker one with three tabs and a thinner steel one.