#5 Main Bearing question for a 360

I"ve got a fresh 408 that drips oil at the rear of the pan. I read in Larry Shepard's small-block mopar book that sometimes leakage is caused by oil directed to the rear main can cause leakage. His book says a special bearing
(has two groves) to direct the oil away from the seal. My 360/408 has clevite bearings, but I'm not sure if they are designed with two groves. Does anybody out there know?

Thanks
Tony
70duster0340@sbcglobal.net