So I attempted to drain my oil for changing since the guy that rebuilt the motor (4.3l) didn’t install the dipstick tube etc. after removing the drain plug I find that it is larger thread with a coarse pitch compared to the 1/2-20 of the banjo bolt assembly on the dipstick. So now I need to determine the right part numbers for a dipstick banjo bolt etc that uses this larger coarse thread. Does anyone have any clue what I’m dealing with here? I’m at my wits end with this one...