Need one for the 331 going in the 77 Comet. The contact point is the main stud nuts on the rear main cap. I tried a 7 qt 68 Ford pickup pan but have screwed it up trying to clearance it. It had better clearance than the car 5 qt pan. All the aftermarket deep or otherwise larger front sump pans are enlarged stock pans, so they have the same issue. I don't want to try this again with a $200 aftermarket pan. The pan I ruined was a freeby.