cooling system

hey Brett, Its a Derale fan 19", and I am runing NGK plugs, I had it in the yard when she ran hot , the first time she was in the garage but as she strated to heat up we pushed her out. I was running a 160 thermo in it, I pulled it out right now she doesnt have one at all just to see if that would help. That new fan blows hard but I think its to far away from the radiator to do much good.

If thats spacer doesnt help I will either have to go with an Aux fan like pro street said or break down and pay $250 for a shroud. Right now 250 sounds cheap compared to what I have in the motor.