LIFTER VALLEY Pan Small block

If your are talking about the tray that goes in the lifter valley, I haved used the Moroso one in all my small blocks. I have always had to trim them to fit, due to different castings. It keeps the hot oil off the bottom of the intake. I like to use them to keep the lifter in place in case of a pushrod failure. If the lifter comes out , you will lose oil pressure.