340 fan spacer?

[Airfix]

Does the 340 have a fan spacer? I have about a 2" gap between the fan blades and rad, just found a spacer in one of my parts boxes, it is about 3/4" thick, if I install it it will leave me 1 1/4" fan clearance, I guess it would probably improve airflow through the shroud.
Appreciate it if you could look at yours to see if the spacer is installed, mine's a 1970.
Thanks for your help.

 

[3404speed]

I had bought a stock fan and viscous set up from a dealership, and the Dart had a longer shaft on the Viscous hub...