It's a dog below 1300 rpm but after is fine, is it safe to keep it on, I never rev the engine past 3500rpm 219k miles high

 

It may wear out the water pump bearing faster, and is noisy but engine shouldn't overheat so it is OK to run that way

 

I'm running an E water pump, I've already noticed the loud woosh and mmmmm from the fan, anything else I should worry about

 

No, can't think of anything if its fully locked, if it still can be turned with some effort it may get unbalanced eventually, you would feel a vibration when this happens.
You could replace it with flex fan setup and get rid of the fan clutch, less noisy, or an e-fan of course

 

From a Ford flex? And there's absolutely no play in the fan

 

No, Flex fan is a generic name for radiator fans that have flexible blades, they are quieter than fixed angle fan blades when used without a fan clutch
A flex fan would bolt directly to the pulley, with a stand off to put it close to radiator inside shroud, so it spins at pulley RPM always, like your Locked Fan clutch, but less noise and less drag on the engine because blades flex flatter as RPMs go up
Assumption is that as RPMs are higher vehicle motion forces air thru radiator so fan doesn't need to pull as much air thru as when idling or at lower speeds

 

What would you recommend for an E fan setup, otherwise I'll try the flex fan

 

Some articles here on e-fans for rangers: https://therangerstation.com/tech_li...-heating.shtml

E-fan is a much better choice since it doesn't use crank shaft power(horse power) when driving at higher speed, only when stopped or driving slowly
As said, the air flow thru the radiator provides enough cooling above say 40MPH so fan isn't needed at all
Under 40MPH the e-fan can come on and draw power from alternator, which does use horse power, like the current mechanical fan does all the time now.

Ain't much power, but ain't 0 power either., lol

 

Thank you

 

I do recommend mounting e-fan temp sensor on the lower hose in most applications

The lower hose from radiator is the "cooled" coolant temp, radiator provides 15-20deg of cooling, up to 25 deg with fan on high
When you have an engine under load cylinder temps go up, so coolant temps go up, and usually SPEED goes up, lol
With speed comes more air cooling thru rad, more air flow, so lower rad temp hose reflects that extra cooling and won't spike up like upper hose would
If temp senor is on the upper hose it would trigger fan to come on as coolant temp went up regardless of the extra cooling the speed provides

You only need the fan to come on when extra cooling is needed that regular air flow thru rad can't provide