Thanks for the tip @Marco Lau.
I was leaning towards the 2 row or the 3 row rad, but I’m curious why would the 2 row rad be the choice over the 3 row.
Also, couldn’t find if the 13aa is a 2 row
I have had a 2 row and a 3 row unit, and the 2 row is slightly thinner IMO. Also 2 row flows faster with less restriction and our rig seems to benefit from those higher RPMs long hill climb in 2nd or 3rd gear....