The Holley pan for the LSx has a really small sump, I already had the pan for my planned 3rd gen LS swap because I wanted to use stock manifolds and stock exhaust routing with it. It's advertised as a 5 quart pan I think, but I remember reading/seeing somewhere that the pan only really holds 3 quarts? I was planning a slight overfill, but I cant go crazy, so if I see ANY RR track time I could kill the engine really fast.
Also I figure if I am going to spend $7,000-$15,000 on a new engine that the ~$500 I spend on an Accusump is CHEAP insurance regardless of wet or dry sump (LS3 or LS7). I think I can tuck it up front under my radiator support so it will be out of the way and still protected by the metal front valence from road debris.
Plus I really wanted it