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-Will a 3 row be proactive in avoiding heat rejection when I eventually install an AC or need to fully load/tow a trailer on future hot days that reach 90F-100F?
Also there is a 3rd top attachment screw on the inside of the duct at center where fan blades are...hard to get to and is not seen as other screws are.
Reviewing your photos, I see that your heater hose return line goes to the top of the water pump. This was standard for trucks that did not have A/C and had the 2-row radiator. Yet, another photo shows that you have a radiator with the heater return connection right below the radiator filler which is standard for trucks with A/C. Where does this hose go from this connection on your truck?