It’s been awhile since I’ve tinkered with big blocks and I never really had an issues but don’t they offer a heavier spring for the oil pumps and haven’t guys shimmed their spring to raise pressure some. I know 440source offers an adjustable one.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time