If you are talking about this type of pickup, you can also weld it to the pan, instead of using a bulkhead fitting to secure it. Then you just weld the bung over the same hole on the outside.
There is a male fitting that screws into the stationary pick up, and you "can" put an o ring and washer on it, w/ the nut on the out sid4ew/ an o ring and washer underneath it . I DID, before pulling it on the engine stand , for the swinging pick up. Why, just cause I always wanted one.
Their are a few diff combinations that a guy can use.
