Anyone familiar with the use of these pans? I was wondering what the capacity is and if these are for a dry sump system? if so what does it take to make the 4B "dry". My reasoning is front diff clearence. I could notch the rear sump pan I have but would like cleaner/bolt-on solution. My concern w/ flat pan is reduced oil capacity and extra plumbing & scavenging pump for a "dry system.