combo ?

[old school truck dude]

Id run it through the a/c cond if it was me, and make sure theres plenty of space between it and the rad so mud dont get stuck in there

[mutt truck]

I am runnin a 350 with 3000 sthal up to a buick big block... 500+ with no probe and my tranny is stock. I am also run my cooler through a k5 ac condensor seems to work just fine. My cooler is also seperate from my radiator, that might help too.