There are several threads in the archives on electric water pumps, mostly questions. Very few were actually installed and street driven. They just don't move enough water.
One now-deceased owner in So-Cal chapter installed one of the best electric pumps of the day (the type used with engine dynomometers for 5-minute runs) and made it all the way to 'Vegas and back for a Fun Rally. But this was a stone-stock Pantera that was driven conservatively, mostly in 5th gear. He had to cut the access door frame to fit.
I asked about his water temp and he admitted that it was 'around' 230F on the gauge the entire trip, and he was an excellent mechanic. He did not attend the Track Event. Can you say "ragged edge?" IMHO there's no way a modified engine or one driven as they were intended would have survived.