Clutch Fan and fan combo doesn't fit

[Montierth]

Hey guys, I am switching back to a mechanical fan with clutch on my 350 SBC with vintage air. I'm in AZ and am not seeming to get the cooling I wanted from the electric fans so I'm switching back. I read a lot of posts and realize a lot of you are in cooler climate states so recommendations may not work as well in our 115 degrees summers with AC going.

On the forums I have seen 2 recommendations for fans and clutches. I bought one of the recommended combos: Hayden 2705 clutch and Derale 6 blade 17118 fan. As you can see in the photos the fan does not fit on the clutch. How are people making this combo work? Has the manufacturer changed the parts?

The other option is the Hayden 2747 with a 7 blade fan (not sure which fan people are using) which is a HD setup. Not sure I want to do this setup as the fan runs more often and louder. But willing to do if it is the fix.

Any other combos the fit and work together? I am using a stock AC shroud and a long waterpump.