Over Heating Problems

[HP2]

Would a 17" seven blade fan work.  Does the more blades cool better?  When I get a smaller fan I am going to put the shroud on.

Generally, but it depends. The whole object you are after is moving more air. That can be accomplished with more blades, bigger blades, steeper angle of blades or better air flow control (shrouds and duct work).

[mopar12372]

a stock 18 in 6 blade clutch fan from a wrecking yard will work just fine or you can buy the set up at the autoparts store , mancini clutch fan setupo will work too . shroud for a 26 in rad 86$ and a clutch fan check timming and be done with it . oh a  known working temp gauge

[Bullitt-]

It over heats at low speed with AC on.  Got up to 220 degrees at a red light.  So I turned on the heater which brought it down to 210 until I could get it moving.

I'd say your not overheating, my Dakota runs at 210 which is middle of the factory gauge.
But you do apparently have airflow problems that the right fan/shroud combo should help to stabilize the temps.