408 valve train noise

I had to go with a small base circle cam on my retrofit hydraulic roller to keep the lifter oil groove from being exposed at max lift. I ran my oil pump with a drill and turn the engine over by hand to verify no excessive oil bleed off. The hydraulic rollers in a SB mopar also make the geometry worse and in a lot of cases you will need to enlarge the push rod holes in the heads for clearance.