One job done, and now the bigger begins. Will have to remove the radiator and it's panel, the apron, plus the right-side wing, in order to get at the front of the engine. After that, the fan, pulleys, etc., will have to come off, and from there gain access to the timing chain and its mechanisms. The sump will stay off until that's done, just in case any small parts fall from the front of the engine, when open, wherein it would be easy for those parts to enter the sump.
For today, this was enough: the oil pump, looking a little cleaner, re-installed. Note the dipstick, there as well, and the non-authentic-for-the-period front prop shaft.