I got the whole job done this evening. The only problem is I'm unsure of how to properly tighten the big nut that attaches the fan to the water pump pulley???
Is there an affordable tool? We made a tool to fit the tiny holes in the old water pump pulley to hold it in place while tightening, but the holes in the new pulley were in a different location so our tool wouldn't work.

1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual