Minimum radiator core rows needed for 350

[geezer#99]

I bought one from napa. It was 3 core with the tranny cooler in it.
Sometimes more cores is not the solution. What the rad is made out of, the shape of the tubes in the rad and the fins all contribute. I've seen a custom built 5 core rad cool no better than a 2 core rad. Air flow thru the rad is important. Sealing around the outside is needed. Properly set up fan shroud and size and shape of fan is important too.
Lots of factors. Look on ebay for custom 4 core rads made from aluminum. Most are well priced.