Bart: I think we've all heard those admonitions before. I had two 356s and they leaked or oozed, depending on your point of view, some. I learned how to seal up the oil drain plate properly and thus limited the mess and bother. BTW I have a JPS and it does not leave much on the floor -- very little really. I do go under there from time to time and wipe it down, because it does sweat (ooze??) a little oil from here and there. Not sure if anybody has ever counted the number of places one of these engines COULD leak from, or how many inches of seal are needed to keep the oil inside. It is a lot. Skill in manufacture (close tolerances) and skill in assembly can produce tight cases and little drip. Screw up just one of those, and there will always be more oil than you'd like on the outside.
One of my valve cover gaskets slipped or cracked or something a while ago, and started dumping oil on the exhaust. Was heading to the gas station, and had less than a mile to go. Was leaving a really nice smoke screen behind and me thinking the worst -- i.e., a broken ring. a fellow there saw my trouble, and offered help. I said i needed a ride home to fetch a new gasket. So I pushed the car off to a corner at the station, took the offending VC with me, he dropped me off, I did my thing, and my sweetie rode me back to the station with a couple of qts of oil in tow. Took a couple of hours out of my afternoon. Other than that, which was extreme, no leaks.