Question about oil seal around dipstick on 360

Hi guys,I have a 68 dart with a 360 in it. noticed when I checked my oil that the tube is loose and wiggles back and forth then I pull out the dipstick. It appears to be leaking oil from around the seal too after the car is running. Oil is at proper level. Anybody here dealt with this issue? Is there any o ring around the end of the tube? Any tips on replacing it?