Because it’s a Chrysler that has idiotic oil timing. You can’t get enough oil to the rockers soon enough without one, especially if you are running full groove main bearings and any half assed performance oriented Chrysler should have them.
I’ve been running HV oil pumps since 1980. Never failed a pump drive. And I only started using HD drives when I started shifting at 8k plus.
My street/strip junk still runs a standard pump drive.
