Big block cooling question

28x19 instead of 18. I took it out for a short trip to town to fill it up today. The temp was 96, with 57 % humidity, heat index was well over a hundred. Engine warmed up to about 190 and held till I got to the first stop light, went to 202, thru town, topped tank off w/ real 91, temp went to 215, dropped to 212 and stayed there till I got back on the 4 lane, dropped to 206, till I started wasting a smart ***, went up to 208 till I got home. Not bad, but seems like the car runs better around 190 -195.
Still going to try a a clutch fan next, will have a bunch of fans for sale when I get done testing.
Thinking about a flowkooler water pump to, just don`t know if it will be bettr than
the hi volume that's already on there. My 15" pusher in front will run my battery down also. Tempted to take it off and try it w/o it , according to stansblu72 `s suggestion.------------------------AND THE SAGA CONTINUES----------
Sounds like you got the double whammy going on, the radiator is willing but the other components are lacking.
Air at slow speeds are always a problem, my experience is that electric fans are not the answer. I have had very good performance from the stock 7 blade 18 inch fan/shroud with a heavy duty clutch hub. Make sure you are not sucking the lower radiator hose closed at higher rpm which will cause temps to raise that you will never get back - just keeps getting hotter. Do you run a hi-flow T-stat? What is your current crank to water pump pulley ratio?
There is a big difference when it comes to clutch fans make sure you get the correct one for your application.