OK, how about just a big think you?
Purchased a 1966 250s that was sitting for 10 years. Somewhat dismantled. I cleaned up the engine, prepped it, ran fuel from a fresh tank of gas, and I'll be damned, the thing fired up!
I'm all proud of myself, walk to the front of the car, only to see oil gushing out of a hole in the middle of this nut in the case of the engine (see link below for picture)
I've looked in the three manuals I have, nothing says what this nut is, or what is supposed to be in this hole in the center of this nut.
I appreciate your help - sorry for it being a silly, simple question, but it is only silly & simple if you know the answer!