It won't work that way. The pump turns the clutch. The clutch turns the fan. You need a fan with a big center hole and the big bolt circle to match the clutch.
1. Run no fan clutch and see how the cooling is with just the fan and shroud.
2. Purchase Derale 17118 6 blade fan (might have room to run this fan with current clutch we will know in 2 days as I already ordered it, fingers crossed)
3. Purchase Hayden 2794 if this clutch with the derale 17118 does not work with this clutch.