CHAMPION RADIATOR 3 CORE
Aluminum radiators have thicker cores which brings the core closer the water pump and as 72 pointed out those 16" fan kits do not pull enough air to cool.
I have a Cold Case aluminum radiator and run a 18" aluminum flex fan with a spacer long enough to get it in the right spot and use a stock shroud that has been modified to fill the gaps created by how most aluminum radiators set up the shroud mounting.
This thread shows what I did at poet 5. I have a 70-up water pump.
Cold Case Radiator Shroud?
There isn't a shorter snout water pump. The 69 and down is, but is wrong for your year in regards to several fitment issues.