The reason for the deeper oil pan is because I have a main girdle and main studs. I needed a pan that would fit, and this one did. The oil pickup I used is for a 4.2L F150 as well. In addition, the usual SC dipstick wouldn't clear the main girdle, when I tried to bend it I broke it. So I used the 4.2L f150 dipstick, which was too long for the SC tube, so I cut it.
Thus the "FULL" mark will not work, thus why I am asking the question.
As I said in the first post, I assumed 6 qts, but was looking for someone to chime in.