Years ago I called Meziere about this, told them I had a 700 HP FE engine and asked which of their electric water pumps would be suitable for street use. They told me that their standard FE pumps, 37 and 42 gpm, would not be enough for my application, and that I should use one of their remote 55 gpm units. I ended up just going with a mechanical pump on that engine for Drag Week 2005, because I didn't want to mess with a remote pump
A couple years later I called Meziere again, hoping something had changed, but basically got the same story. That is what got me going on designing and building the adapters to use the CVR 55 gpm pump on FEs. That pump has proven to be perfectly capable of cooling a big, high horsepower engine on the street.
I think for track use only any of the smaller pumps would work, but I'd lean towards a 55 gpm unit if you have 650+ HP and want to cool reliably on the street.