7.5 quarts here. 572" hemi running 8.90s at 150 mph at 3900 lbs. Haven't had over 7.5 quarts in this motor in 10 years and never had a problem.
I use the cheap 440source fab'd aluminum pan. Milodon single line external p/u.
http://store.440source.com/Oil-Pan-Fabricated-Aluminum-8-Quart/productinfo/200-1076/