Yesterday I installed the replacement radiator. It is an OEM from a 1998 Montero with less than 60k miles. Hard to believe really but that’s what I was told. Anyways, the differences are slightly noticeable. Not only is the OEM slightly thinner than the aftermarket, the nozzle is not as tall and just as you mentioned @toasty, the nozzle was at an angle. That gave me about 2 inches if clearance (guesstimating).
I have pressure tested the radiator and found no leaks. Right now I am driving the vehicle with a radiator flush to clean it up. Already have drained it once. I’m hoping by the next 2 days I will put in my Mitsubishi Coolant.
Remember kids, OEM in these trucks are best, unless it’s an Adventure Driven Design part of course lol.
Also, some aftermarket hoses are crap in design. If you can’t get OEM, this Australian brand hose I got from advance auto parts was perfect. Part number G2000-166169