need feedback on clutch vs flex fan and shroud

LOOK on summits website for it---------------mine is a 17" 6 blade. for sale .

Trying to cool over 700 horses on the street in a small engine bay A body takes a combination of a lot of things. I ended up pretty much w/ most of what YELLOW ROSE suggested , with a few of my own.
About 198-200 the last two times I drove it. The weather is cooler here now so no testing till next summer, just playing with it ocasionally.