2 rows, downflow. 2 major differences between their standard radiator for a V8 in an AD truck and this version:
1. Standard has a 16 inch centered fan, this one has two 10 inch fans... I needed to maximize the distance between radiator complex (rad, shroud and fan) and front of engine... the 16 inch fan highest point was right at the furthest protrusion of the engine (the water pump shaft as I recall).
2. The upper end of the side mounting fins are recessed around 1.3 inches more towards the rear of the radiator, necessitating the trimming of the upper lip of the radiator frame, but leaving plenty of room for "other stuff" in the upper part of the engine such as air induction tube, etc.