This number is for a 5 blade Hayes-Albion brand fan of which variations in appearance all share the same part number.

For anybody that has the original fan on their 65 small block:

Triangular or rectangular shaped base to which the blades are riveted?

Round head rivets or flat head rivets?

4 rivets per blade or 5 rivets per blade?

Rivet pattern?

Blade area recessed or smooth where it rivets to base?