I measured my radiator thickness it is 2 1/2 inch thick total in rad frame support, and core is 2 inch thick, what core row would that be ? thanks for any information , mike
You should be able to look between the fins and count the rows of tubes.
We don't know if you have round tube or flat tube. If you post a good close up picture of the ends of the tubes and tank connection, we might even be able to count the rows of tubes.