HV oil pump vs Stock oil pan

i've used hv pumps in mopar, ford and chevy motors with stock sump pans and never had and issues. i'd fit it and maybe as mentioned change the oil for a 10/50, 15/50 or even 20/50 grade.
neil
My engine builder warned me NOT to use 50wt oils as the engine was built with tighter bearing clearance's.
Currently use dino oil 10w-40
I was a fool to use my old stock oil pump when we built this engine.
Lesson learned never again