I vote for Flow-Kooler. Had one on a 429. Worked great.

pnut, you'll find that most of the guys on here have been there, done that with cars and trucks. When someone suggests that maybe one type of system will work better than the other, he has usually experienced that system and is giving you a heads-up to save you time, grief and money. The guys will sometimes make a statement that may seem to you to be putting you down for what you chose on your ride. They're not, it's just that they know what works (bulletproof) and what doesn't.