Well, to be honest, I do not know as much as most of the people who post messages here, but I just kind of figured that as engines ge t bigger, so do the oil pans. I had a 6 qt pan on my LS 6 crate engine which I replaced with a 4 qt. pan, when it was seen to hit the frame crossmember, later I got a ticking sound, which does go away, and I was just never very happy with the whole situation. I figure for cooling as well as lubrication, bigger will be better...not talking huge just 6 or 7 quarts...the engine is not yet in the car, and it just feels like the right thing....others please let me have you opinions...you can never have too much information...Thanks again.....RB