Mechanical fan #

I have a 1969 dart with a 440 and a 3 row aluminum radiator, does anyone have this same setup ? And what fan / spacer would you recommend? It has 2 1/4" from the fins to the face of the water pump pulley fyi.
I don't have that setup but I do have a Duster with a 400 and about that same space to the radiator. I've got the fan off right now and will try to remember to look at the part number and size of the spacer and post it. The fan is about an inch off the radiator.