With a good pan I've run as low a 6 qt's with no problem on accel. Hard finish line braking requires at least 7 qts .
Doug
If you choose to try the seven quart pan,(or any system for that matter) a 30 psi or higher pressure switch to the oil system and a light you can't ignore might be worth the trouble. During a run it is not easy to see everything, and a 30 psi or higher switch will let you know if there are issues with your setup. Put it next to the oil pressure gauge.