Water pump GPM?

What's the mechanical water pump GPM for a big block..stock and/or hi-perf?

How do I figure out what GPM I would need in a remote elec water pump?

I know some of you are against an EWP for the street, Fair enough, experience counts but others disagree, still fair enough. I have a special consideration in that I'd like to use a finned alum timing cover for my 392 Hemi to go for a nostalgia look. Well I doubt a mech pump would fit over the finned cover so if there's way to make the remote EWP reliable I say go for it. Even though EWP isn't nostalgia I can be discreet about where its installed.


Its actually the Moon cover but the pic is lousy so there's a Weiand pic also, just to get the idea.

Thanks

moon front cover.jpg

finned timing cover.jpg