I found out the hard way that some converters have 2 drain plugs. After bolting the trans to the block and bolting in the crossmember, hooking up the lines , linkage panfill dipstick. I then decided to put the nuts on the converter only to find out 1 of the drains was behind the welded on weight. I found this out after I had tightened 3 nuts which ended up cocking the converter and when I tried taking it all apart I spent 30 minutes prying it out of the flywheel. I would have sold the car cheap at that point.