ive a baxt in which im boosting im almost ready for assembly but tryin to figure out the best way to go about my return line to the sump. how do i go about tapping it.... difficulty level? seems easy enough. but every one has different opinions on the matter

Alloy sump ?? Drill and tap with grease on both to pick up fillings.....Inside dia should be atleast 14mm.... Try to fit as high as possible ...Btw this is oil return line...