18335 is the low profile 7 quart pan. I am running the 30931 external pick up oil pan on mine because of the 4.50" crank. I ran the 18335 pan with my 528 HEMI in my 69 Fastback. There is also a list of associated parts that go with these oiling systems on this page.
You may be correct. I did see where he stated stock suspension and steering, so I assumed he means the stock k-frame also. I wasn't sure about the oil pan and headers.