I have a 70 Hemi block in the basement but it is decked so nothing on the pad at all. Have to go and take a look at my 1971 Hemi motor out of the Cuda on the floor in the garage and see what is on it. There was nothing but the WT on another 1970 Hemi Block I owned that was an over the counter block that I sold. All the 1966 Hemi Motors I have owned or own have the Letter on the motor, the "B" for the year.