Ive had mine for a few months and Im running it through the radiator as well..runs cool even in traffic. i was running 108 degrees on a 4 hour road trip ..also my friend just installed his on his truck and it helps while towing.

 

im waiting to get my 80e swapped in so at the same time the 40k can get put in. 20 degrees less would be nice.

 

All that I did on mine is take the top transmission line in the radiator off. The top line i ran it through the input line of the cooler and the output line to the top line of the radiator and that was it very simple.