The two styles of plugs below are installed on the engine at the time it is painted.
There are 1/8 inch npt square head pipe plugs PF2 on the left side oil galley: 9 on the 8 cyl and 7 on the 6 cyl.
There is a 1/4 inch npt plug on the right side of the engine, square head cylinder water drain, the head embossed A. This functions as a block drain. There is NO drain cock in this location.