Here is a comprehensive install video with before and after results!
https://www.youtube.com/watch?v=bS5xKcBep_g
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The Derale 13613 by my best research is only rated about 1k btu higher than the Hayden series of coolers for my bracket.
FWIW the Hayden bypass technology seems extremely reliable, but if it worries you, its best to get something else.
I sell the Hayden cooler kits with bolt on bracket over at Iconic Fabrication Offroad. I'd recommend the 698 since it has the built in bypass for cold weather.