Question: How many rows?  How many tubes in your Model A core...

Answer: Rows and tube count are oversimplified and (can be) deceptive. What is important though is....

• The geometry of the tube is extremely important - We use a 3/4" highly elliptical tube commonly called a "flat" tube.  In 1928 the Highland plant uses a 1/4" round tube and in 1930 the Rouge plant used a 3/8" "Jelly bean." Changing geometry increases the tube wall's surface area for better heat transfer.
• The tube wall thickness is important - We use a 006. wall.  Ford used a .015. Thinner wall means quicker transfer of electrons.
• The tube construction is important - We are laser welded. Ford was a lap seamed solder joint; an antiquated construction technique prone to failure.
• The aggregate area of the opening of the tube is important to prevent clogging.
• The aggregate volume in the tubes is important to maximize flow rate. 

So in short, there are fewer tubes than a radiator made almost 100 years ago but because of their shape and construction they have more surface area in contact with coolant and, concomitantly, more contact with the copper fin and there are a whole lot more fins

This is part of the the reason they cool better. The other part is the fin.

Question: What's the difference between Active Driving, Extreme Touring and Show?

We hate using marketing terms but our customers love them so we have adopted the snazzy terms like Active Driver, Extreme Touring and Show quality.  An increase in the fin density reduces engine temperature.  Why?  Because aggregate fin surface area is really nothing more and than an "opportunity for heat exchange" between the source (engine/coolant) and the sink (air).  The more contact, the more heat exchange.  We pulled the data from the Ford plants and compared it to the radiators we make today for active drivers, extreme tourers and those who show their cars to illustrate the scale of the cooling area increase and cooling improvement.  

Wall area calculations were made using Ramanujan's Final approximation of an ellipse developed in 1914.