Massive oil leaks.

I would clean it all up the best you can, recheck the sender, and every bolt you can reach. then either drill the right side cover and install a PCV, or get you another set of baffled covers that are already set up with a good breather on one side, a PCV and hose running to the carb on the opposite side, top it off with oil , and see if that cures it. drive it for a bit, pull over and check it , repeat .

i had a buddy who had a brand new 360, no PCV , blew the dipstick and oil out into the fan , and it looked like someone had just taken a quart of oil and dumped it all over the engine bay.