clutch fan vs standard fan

I TESTED FANS ON MY CAR ALL LAST SUMMER , FLEX, ELEC. CLUTCH TYPE , FIXED FACTORY , ALL WITH A SHROUD , ALL IN A SMALL 68 BARRACUDA ENGINE BAY , W/ A 440/505 WEDGE .WHICH IS FAIRLY HOT , SUPPOSEDLY 761 H.P. , BUT HASNT RUN LIKE IT SO FAR.
I tried 4 dif. elec. fan set ups , but not a contour type , big joke in my case . FIXED 7 BLADE FACTORY COOLED THE BEST , BUT SETTLED ON A 7 BLADE CLUTCH TYPE , THE FIXED FAN WAS ABOUT 7-8 DEGREES BETTER , THAN ANY , BUT ACCORDING TO AN "ENGINE MASTERS" TEST , COST ABOUT 20 H.P------------JFYI
I just scored 7 Blade Mopar fan on Facebook take some measurements but I think the Hayden 2947 is going to do it I've got a damn flex fan on there now and I didn't know anything about those things other than they suck ( but its keeping her cool) but after reading about them being dangerous, I'm done with em