Last 2 posts are good. FWIW, my current w/p has stamped impeller(needed asap/only type could find) but seems to work fine. Rest of setup;
10.2cr(needs to be 11.0) 230/240 hft 19-15/16 flex fan with shroud 180 stat(cause 175 shot n2o sometimes) Rodney Red radiator Valance with no upper baffles Idle gets to 195 when 90* out