I used the Moroso #20460 8qt pan in my 69. The Unisteer knuckle just clears the pan. The angle could have been designed better, IMO.
Search my posts, or look up "Video of our 69 BB" on page 6 of Pro-Street. I fabbed a bracket (shown briefly on 2nd video) for an extra 3/4" rod end and u-joint for header clearance.
The car actually steers fine, even with the severe u-joint angle.
Hope this helps....................DC