Personally I don't block any of the oil from the lifer gallery because I run a flat tappet cam and feel I need the oil on the cam and lifters. I control the spinning crank oil by the use of a custom scraper, the pan baffles, and right side extention.
One competitor I know has blanked off all of the holes in the gallery and drained the oil from the side plate in the back corner along with the front one that leads to the cam gear cover. You need a -8 or -10 hose for this. He runs a roller cam.
You also need to consider controlling the flow of oil to the rockers. There are many ways to do this. Remember the valve springs make a lot of heat and need oil for a coolant so don't block it all off. Also I run true roller rockers and they need far less oil so I contol mine at the fitting entering the head. The stock rocker system needs more oil.
You may consider running a vacuum pump which also helps but can be a little plumbing and baffel problem until you find what works for you and your engine. I now run between 7 and 9 inches of vacuum with a wet sump system....Good Luck
PS: personally I don't like screening in a pan. Louvers and slots in a solid panel have been my choice. Stan also.
