All the guys I knew back then ran 4 quarts in a 4 quart stock oil pan shruggy
the one I helped eventually went to a oil pan off of a Cordoba that was a little deeper, he added a half of a quart also at that time. Adding the anti slosh baffles, front and rear, really helped on keeping the oil pressure steady at both ends of the track up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)