The 90 degree fitting I screw into the block is restricted. I fill it with solder (brass fitting) and drill a .060 hole in it at a slight angle which feeds to the gear. I always use a valve in the line to the to rockers. I set it when I'm priming the pump prior to the first starting the engine. I run a lot more rod side clearance for the flow than stock. A stock oil pump has always run at 50# for me at any RPM.
