Well, looks like I have the issue solved. A local guy donated the proper fan blade I needed to my cause. (Thanks Chuck!) It was an OE part from a small block Mirada. 5 blade, approx. 20" across.

It bolts up to the Hayden 2765/Jag clutch no problem. I have 5/8" clearance between the face of the clutch and the rad. core.

Next issue is figuring out how a 22" shroud is going to work with this fan but I'll figure something out.

Thanks for the replies. Pics below.