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