Best water pump for 450hp 1968 340 ?

Hey guys. Need helping choosing a good quality 8 propeller water pump for my 1964 Valiant that will have a 1968 340 with 450 hp. Any suggestions ?
My 408 stroker had a flowkooler and high flow stat. Never overheated even with sported driving in 102 temps. I had Champion radiator with OE style shroud and mech fan.