Not really. I run High pressure and high volume oil pumps in everything, and I adjust the valves hot and running. It does splash oil a bit but not spraying all over, like you just cut an artery. 340's and HP 360's had high pressure springs, 65 psi, and standard volume.
I started cleaning some parts and the oil pump is a M72 HV .... a standard volume and pressure . this 273 oil pump was spraying like mad at the rockers at idle. might be altered ? spring?
.........
Brand:Melling