Trying to figure out if the builder left out the oil drive in plug that goes in from the bottom of #5 main. I know there is a measurement taken from the oil sending unit but I cannot find it. I read it in Mopar Action a year or 2 ago.

Stick the rod in the sender hole & it should bottom roughly at the middle of the round filter boss since as you know the plug goes inbetween the 2 horizontle in/out passages to the boss (filter). If the rod goes all the way down to the main cap parting line then that is bad news. Dont have an exact measurement but you'll know

I wasn't sure where the plug was exactly. Thanks!